(1) Name :- ActionBarSearchView Description :- Action bar search view. (2) Name :- Adsfree Description :- Admob integration. (3) Name :- AndroidDayDreamDemo Description :- Day dream demo. (4) Name :- android query demo live Description :- Google play live app details parsing. (5) Name :- Arc GIS map Description :- Arc gis map integration without hash key. (6) Name :- aviarySdk Description :- Aviary integration for image operations. (7) Name :- BetterGestureDetector Description :- Gesture accrate detection. (8) Name :- BlinkText Description :- Blinking text. (9) Name :- BuzzBoxSDKHelloWorld Description :- Buzz box integration cron scheduler. (10) Name :- CircularProgressBar Description :- Circular progress bar. (11) Name :- ContactNumbersDemo Description :- Get contact details from device. (12) Name :- ControlViewheight Description :- Manage height of specific view. (13) Name :- ControlViewHeightSeekbar Description :- Two listview manage appropriate hieght. (14) Name :- DownloadManagerAndroid Description :- Download specific file online. (15) Name :- Facebook Integration Description :- Facebook integration. (16) Name :- Graphview Description :- Graphview demo. (17) Name :- HB 1337 Description :- Virus and antivirus. (18) Name :- HomeButtonEvent Description :- Block home button press. (19) Name :- HomeLauncher Description :- Home launcher demo. (20) Name :- InAppPurchaseTut Description :- InAppPurchase demo. (21) Name :- KeyboardCustom Description :- Creating Custom keyboard demo. (22) Name :- MapDemoGeofencing Description :- Location map for geo fencing. (23) Name :- MapDemoV2Final Description :- Map demo for google version 2. (24) Name :- OpenGLESSquare Description :- Opengl moving square. (25) Name :- pagination numbering 2 Description :- Pagination type 2. (26) Name :- Pagination numbering Description :- Pagination type 1. (27) Name :- PhoneGapCordova Description :- Phone gap simple cordova demo. (28) Name :- PhoneGapCordovaCamera Description :- Phone gap for camera. (29) Name :- PhoneGapCordovaParsing Description :- Phone gap for parsing. (30) Name :- PhoneGapCordovaSMS Description :- Phone gap for sending sms. (31) Name :- RotatingWheel Description :- Rotating wheel by user interaction. (32) Name :- RotatingWheelSocialsites Description :- Rotating wheel by user interaction for socialsites. (33) Name :- RunningBackgroundServices Description :- Get Running services in background for package name/class name. (34) Name :- SearchList Description :- Searching from a specific list. (35) Name :- SearchViewContacts Description :- Search from contacts details. (36) Name :- SlidingDrawer Description :- Sliding drawer from bottom over another activity. (37) Name :- SpeechToTextDemo Description :- Convert speech to text. (38) Name :- TextToSpeak Description :- Convert text to speech. (39) Name :- TouchCordinates Description :- Get coordinate of user touch intergration. (40) Name :- TreeViewListDemo Description :- Tree view integration demo. (41) Name :- UninstallDeleteapp Description :- Uninstall another app from my app after removing admin permission. (42) Name :- ViewPagerCustomWidthFragment Description :- Fragment in viewpager. (43) Name :- WearableNotification Description :- Wearable notification. (44) Name :- WearablePages Description :- Wearable pages. (45) Name :- WidgetDemo Description :- Widget demo. (46) Name :- CameraIntentAll Description :- Camera demo for picture as well as video demo. (47) Name :- CameraOverlay Description :- Camera overlay image as aim shooting game. (48) Name :- DrmIntegration Description :- Drm Integration library for authorize users apk file. (49) Name :- SwipeRefreshLayout Description :- SwipeRefreshLayout Pulltorefresh like google. (50) Name :- TwitterIntegration Description :- Twitter Integration. (51) Name :- CameraADev Description :- Custom Camera for picture as well as video capture from android developer. (52) Name :- DataBaseSQLiteCRUD Description :- Simple SQLite CRUD funtions for contact database. (53) Name :- DataBaseSQLiteDBUtility Description :- Simple SQLite DBUtility all files and basic operations. (54) Name :- CustomDropdownMenu Description :- Custom Dropdown/Poup Menu. (55) Name :- CalenderSimpleView Description :- Simple calender view as well as timestamp using calender class. (56) Name :- CalendarProviderADevIntent Description :- Calender provider Intent from android developer. (57) Name :- AnimationTextViewAnimateLayoutChanges Description :- Animation of adding view inside another view using animatelayoutchanges. (58) Name :- DragnDropLowVersion Description :- Drag n drop funtionality for low version. (59) Name :- GoogleWalletAdev Description :- Google Wallet Integration from android developer. (60) Name :- AndroidShootingGame Description :- Android Shooting Game without opengl. (61) Name :- ViewPagerAnimation Description :- ViewPager page transformation for pages like alpha,scaling,rotation. (62) Name :- GoogleCloudWirelessPrintingIntent Description :- Google cloud wireless printing integration from google developer. (63) Name :- Barcode_or_QRCode_Scanner_openurl Description :- Barcord/QR code scanner from google play and open result url in browser. (64) Name :- MSServerListSyncSample Description :- List Sync Sample using MS Server. (65) Name :- SlidingMenuAPI Description :- Sliding Menu jeremyfeinstein library like facebook,gmail,etc. (66) Name :- GCMIntegration Description :- Google cloud messageing integration for notification. (67) Name :- NoiseAlert Description :- Detect noise or blow sound. (68) Name :- GregorianCalendar Description :- Basic Gregorian Calendar information. (69) Name :- getVariableName Description :- Get name of the variable not its value. (70) Name :- GoogleAnalyticsV4Adev Description :- Google analytics integration V4. (71) Name :- FlipboardAnimationAdev Description :- Animation like Flipboard. (72) Name :- Html5Camera Description :- Camera in Html5 without phonegap. (73) Name :- CopyPasteClipboard Description :- Copy & Paste Clipboard textual data. (74) Name :- AndroidPhpMysql Description :- Php and Mysql data parsing in android. (75) Name :- SpellChecker Description :- Check spelling and give appropriate suggestion for enter text. (76) Name :- PdfReader Description :- Read pdf file.Barcode/QR code scanner. (77) Name :- BarcodeQRcodeIntegration Description :- Barcode/QR code scanner using ZbarScanner lib and also Zxing lib without intent. (78) Name :- InstagramIntegrationApi Description :- Instagram Integration using sample demo. (79) Name :- Logger Description :- Read logger/logcat using api. (80) Name :- SmsControl Description :- Control device via sms codes. (81) Name :- EncryptDecryptString Description :- Encrypt string and Decrypt the same string. (82) Name :- FloatingActionButton Description :- Floating Action Button. (83) Name :- DownloadAndUnzipFile Description :- Download And Unzip File. (84) Name :- MoPubAd Description :- MoPub Ad Banner integration . (85) Name :- ListViewParsingDB_AndroidStudio Description :- ListView Parsing in android studio. (86) Name :- CustomCamera_AS Description :- Custom Camera using surfaceview. (87) Name :- ResizeableBox_AS Description :- Resizeable Box like crop. (88) Name :- AudioRecorder_AS Description :- Audio Recorder. (89) Name :- DateAndTimePicker_AS Description :- Date And Time Picker. (90) Name :- CustomActionBar_AS Description :- Simple Custom ActionBar. (91) Name :- CustomSpinner_AS Description :- Custom Spinner with default text item. (92) Name :- SendEmail_AS Description :- Send email in background after authentication. (93) Name :- GoogleAnalytics_AS Description :- GoogleAnalytics integration demo for crash and screen. (94) Name :- BroadcastReciever_AS Description :- Broadcast Reciever for sms ,call and boot receiver. (95) Name :- Azure Description :- Azure storage gsi credentials zip dowload. (96) Name :- InAppPurchase_AS Description :- In App Purchase simple demo. (97) Name :- iOS_Listview Description :- Simple Listview in ios. (98) Name :- iOS_Database Description :- Sqlite Database in ios. (99) Name :- MessangerList_AS Description :- Messanger Listview UI send and recieve. (100) Name :- FindingFriend_AS Geofencing for enter and exit another pin.

A list of practical projects that anyone can solve in any programming language (See solutions). These projects are divided into multiple categories, and each category has its own folder. To get started, simply fork this repo. CONTRIBUTING See ways of contributing to this repo. You can contribute solutions (will be published in this repo) to existing problems, add new projects, or remove existing ones. Make sure you follow all instructions properly. Solutions You can find implementations of these projects in many other languages by other users in this repo. Credits Problems are motivated by the ones shared at: Martyr2’s Mega Project List Rosetta Code Table of Contents Numbers Classic Algorithms Graph Data Structures Text Networking Classes Threading Web Files Databases Graphics and Multimedia Security Numbers Find PI to the Nth Digit - Enter a number and have the program generate PI up to that many decimal places. Keep a limit to how far the program will go. Find e to the Nth Digit - Just like the previous problem, but with e instead of PI. Enter a number and have the program generate e up to that many decimal places. Keep a limit to how far the program will go. Fibonacci Sequence - Enter a number and have the program generate the Fibonacci sequence to that number or to the Nth number. Prime Factorization - Have the user enter a number and find all Prime Factors (if there are any) and display them. Next Prime Number - Have the program find prime numbers until the user chooses to stop asking for the next one. Find Cost of Tile to Cover W x H Floor - Calculate the total cost of the tile it would take to cover a floor plan of width and height, using a cost entered by the user. Mortgage Calculator - Calculate the monthly payments of a fixed-term mortgage over given Nth terms at a given interest rate. Also, figure out how long it will take the user to pay back the loan. For added complexity, add an option for users to select the compounding interval (Monthly, Weekly, Daily, Continually). Change Return Program - The user enters a cost and then the amount of money given. The program will figure out the change and the number of quarters, dimes, nickels, pennies needed for the change. Binary to Decimal and Back Converter - Develop a converter to convert a decimal number to binary or a binary number to its decimal equivalent. Calculator - A simple calculator to do basic operators. Make it a scientific calculator for added complexity. Unit Converter (temp, currency, volume, mass, and more) - Converts various units between one another. The user enters the type of unit being entered, the type of unit they want to convert to, and then the value. The program will then make the conversion. Alarm Clock - A simple clock where it plays a sound after X number of minutes/seconds or at a particular time. Distance Between Two Cities - Calculates the distance between two cities and allows the user to specify a unit of distance. This program may require finding coordinates for the cities like latitude and longitude. Credit Card Validator - Takes in a credit card number from a common credit card vendor (Visa, MasterCard, American Express, Discoverer) and validates it to make sure that it is a valid number (look into how credit cards use a checksum). Tax Calculator - Asks the user to enter a cost and either a country or state tax. It then returns the tax plus the total cost with tax. Factorial Finder - The Factorial of a positive integer, n, is defined as the product of the sequence n, n-1, n-2, ...1, and the factorial of zero, 0, is defined as being 1. Solve this using both loops and recursion. Complex Number Algebra - Show addition, multiplication, negation, and inversion of complex numbers in separate functions. (Subtraction and division operations can be made with pairs of these operations.) Print the results for each operation tested. Happy Numbers - A happy number is defined by the following process. Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers. Display an example of your output here. Find the first 8 happy numbers. Number Names - Show how to spell out a number in English. You can use a preexisting implementation or roll your own, but you should support inputs up to at least one million (or the maximum value of your language's default bounded integer type if that's less). Optional: Support for inputs other than positive integers (like zero, negative integers, and floating-point numbers). Coin Flip Simulation - Write some code that simulates flipping a single coin however many times the user decides. The code should record the outcomes and count the number of tails and heads. Limit Calculator - Ask the user to enter f(x) and the limit value, then return the value of the limit statement Optional: Make the calculator capable of supporting infinite limits. Fast Exponentiation - Ask the user to enter 2 integers a and b and output a^b (i.e. pow(a,b)) in O(LG n) time complexity. Classic Algorithms Collatz Conjecture - Start with a number n > 1. Find the number of steps it takes to reach one using the following process: If n is even, divide it by 2. If n is odd, multiply it by 3 and add 1. Sorting - Implement two types of sorting algorithms: Merge sort and bubble sort. Closest pair problem - The closest pair of points problem or closest pair problem is a problem of computational geometry: given n points in metric space, find a pair of points with the smallest distance between them. Sieve of Eratosthenes - The sieve of Eratosthenes is one of the most efficient ways to find all of the smaller primes (below 10 million or so). Graph Graph from links - Create a program that will create a graph or network from a series of links. Eulerian Path - Create a program that will take as an input a graph and output either an Eulerian path or an Eulerian cycle, or state that it is not possible. An Eulerian path starts at one node and traverses every edge of a graph through every node and finishes at another node. An Eulerian cycle is an eulerian Path that starts and finishes at the same node. Connected Graph - Create a program that takes a graph as an input and outputs whether every node is connected or not. Dijkstra’s Algorithm - Create a program that finds the shortest path through a graph using its edges. Minimum Spanning Tree - Create a program that takes a connected, undirected graph with weights and outputs the minimum spanning tree of the graph i.e., a subgraph that is a tree, contains all the vertices, and the sum of its weights is the least possible. Data Structures Inverted index - An Inverted Index is a data structure used to create full-text search. Given a set of text files, implement a program to create an inverted index. Also, create a user interface to do a search using that inverted index which returns a list of files that contain the query term/terms. The search index can be in memory. Text Fizz Buzz - Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”. Reverse a String - Enter a string and the program will reverse it and print it out. Pig Latin - Pig Latin is a game of alterations played in the English language game. To create the Pig Latin form of an English word the initial consonant sound is transposed to the end of the word and an ay is affixed (Ex.: "banana" would yield anana-bay). Read Wikipedia for more information on rules. Count Vowels - Enter a string and the program counts the number of vowels in the text. For added complexity have it report a sum of each vowel found. Check if Palindrome - Checks if the string entered by the user is a palindrome. That is that it reads the same forwards as backward like “racecar” Count Words in a String - Counts the number of individual words in a string. For added complexity read these strings in from a text file and generate a summary. Text Editor - Notepad-style application that can open, edit, and save text documents. Optional: Add syntax highlighting and other features. RSS Feed Creator - Given a link to RSS/Atom Feed, get all posts and display them. Quote Tracker (market symbols etc) - A program that can go out and check the current value of stocks for a list of symbols entered by the user. The user can set how often the stocks are checked. For CLI, show whether the stock has moved up or down. Optional: If GUI, the program can show green up and red down arrows to show which direction the stock value has moved. Guestbook / Journal - A simple application that allows people to add comments or write journal entries. It can allow comments or not and timestamps for all entries. Could also be made into a shoutbox. Optional: Deploy it on Google App Engine or Heroku or any other PaaS (if possible, of course). Vigenere / Vernam / Ceasar Ciphers - Functions for encrypting and decrypting data messages. Then send them to a friend. Regex Query Tool - A tool that allows the user to enter a text string and then in a separate control enter a regex pattern. It will run the regular expression against the source text and return any matches or flag errors in the regular expression. Networking FTP Program - A file transfer program that can transfer files back and forth from a remote web sever. Bandwidth Monitor - A small utility program that tracks how much data you have uploaded and downloaded from the net during the course of your current online session. See if you can find out what periods of the day you use more and less and generate a report or graph that shows it. Port Scanner - Enter an IP address and a port range where the program will then attempt to find open ports on the given computer by connecting to each of them. On any successful connections mark the port as open. Mail Checker (POP3 / IMAP) - The user enters various account information include web server and IP, protocol type (POP3 or IMAP), and the application will check for email at a given interval. Country from IP Lookup - Enter an IP address and find the country that IP is registered in. Optional: Find the Ip automatically. Whois Search Tool - Enter an IP or host address and have it look it up through whois and return the results to you. Site Checker with Time Scheduling - An application that attempts to connect to a website or server every so many minute or a given time and check if it is up. If it is down, it will notify you by email or by posting a notice on the screen. Classes Product Inventory Project - Create an application that manages an inventory of products. Create a product class that has a price, id, and quantity on hand. Then create an inventory class that keeps track of various products and can sum up the inventory value. Airline / Hotel Reservation System - Create a reservation system that books airline seats or hotel rooms. It charges various rates for particular sections of the plane or hotel. For example, first class is going to cost more than a coach. Hotel rooms have penthouse suites which cost more. Keep track of when rooms will be available and can be scheduled. Company Manager - Create a hierarchy of classes - abstract class Employee and subclasses HourlyEmployee, SalariedEmployee, Manager, and Executive. Everyone's pay is calculated differently, research a bit about it. After you've established an employee hierarchy, create a Company class that allows you to manage the employees. You should be able to hire, fire, and raise employees. Bank Account Manager - Create a class called Account which will be an abstract class for three other classes called CheckingAccount, SavingsAccount, and BusinessAccount. Manage credits and debits from these accounts through an ATM-style program. Patient / Doctor Scheduler - Create a patient class and a doctor class. Have a doctor that can handle multiple patients and set up a scheduling program where a doctor can only handle 16 patients during an 8 hr workday. Recipe Creator and Manager - Create a recipe class with ingredients and put them in a recipe manager program that organizes them into categories like desserts, main courses, or by ingredients like chicken, beef, soups, pies, etc. Image Gallery - Create an image abstract class and then a class that inherits from it for each image type. Put them in a program that displays them in a gallery-style format for viewing. Shape Area and Perimeter Classes - Create an abstract class called Shape and then inherit from it other shapes like diamond, rectangle, circle, triangle, etc. Then have each class override the area and perimeter functionality to handle each shape type. Flower Shop Ordering To Go - Create a flower shop application that deals in flower objects and use those flower objects in a bouquet object which can then be sold. Keep track of the number of objects and when you may need to order more. Family Tree Creator - Create a class called Person which will have a name, when they were born, and when (and if) they died. Allow the user to create these Person classes and put them into a family tree structure. Print out the tree to the screen. Threading Create A Progress Bar for Downloads - Create a progress bar for applications that can keep track of a download in progress. The progress bar will be on a separate thread and will communicate with the main thread using delegates. Bulk Thumbnail Creator - Picture processing can take a bit of time for some transformations. Especially if the image is large. Create an image program that can take hundreds of images and converts them to a specified size in the background thread while you do other things. For added complexity, have one thread handling re-sizing, have another bulk renaming of thumbnails, etc. Web Page Scraper - Create an application that connects to a site and pulls out all links, or images, and saves them to a list. Optional: Organize the indexed content and don’t allow duplicates. Have it put the results into an easily searchable index file. Online White Board - Create an application that allows you to draw pictures, write notes and use various colors to flesh out ideas for projects. Optional: Add a feature to invite friends to collaborate on a whiteboard online. Get Atomic Time from Internet Clock - This program will get the true atomic time from an atomic time clock on the Internet. Use any one of the atomic clocks returned by a simple Google search. Fetch Current Weather - Get the current weather for a given zip/postal code. Optional: Try locating the user automatically. Scheduled Auto Login and Action - Make an application that logs into a given site on a schedule and invokes a certain action and then logs out. This can be useful for checking webmail, posting regular content, or getting info for other applications and saving it to your computer. E-Card Generator - Make a site that allows people to generate their own little e-cards and send them to other people. Do not use Flash. Use a picture library and perhaps insightful mottos or quotes. Content Management System - Create a content management system (CMS) like Joomla, Drupal, PHP Nuke, etc. Start small. Optional: Allow for the addition of modules/addons. Web Board (Forum) - Create a forum for you and your buddies to post, administer and share thoughts and ideas. CAPTCHA Maker - Ever see those images with letters numbers when you signup for a service and then ask you to enter what you see? It keeps web bots from automatically signing up and spamming. Try creating one yourself for online forms. Files Quiz Maker - Make an application that takes various questions from a file, picked randomly, and puts together a quiz for students. Each quiz can be different and then reads a key to grade the quizzes. Sort Excel/CSV File Utility - Reads a file of records, sorts them, and then writes them back to the file. Allow the user to choose various sort style and sorting based on a particular field. Create Zip File Maker - The user enters various files from different directories and the program zips them up into a zip file. Optional: Apply actual compression to the files. Start with Huffman Algorithm. PDF Generator - An application that can read in a text file, HTML file, or some other file and generates a PDF file out of it. Great for a web-based service where the user uploads the file and the program returns a PDF of the file. Optional: Deploy on GAE or Heroku if possible. Mp3 Tagger - Modify and add ID3v1 tags to MP3 files. See if you can also add in the album art into the MP3 file’s header as well as other ID3v2 tags. Code Snippet Manager - Another utility program that allows coders to put in functions, classes, or other tidbits to save for use later. Organized by the type of snippet or language the coder can quickly lookup code. Optional: For extra practice try adding syntax highlighting based on the language. Databases SQL Query Analyzer - A utility application in which a user can enter a query and have it run against a local database and look for ways to make it more efficient. Remote SQL Tool - A utility that can execute queries on remote servers from your local computer across the Internet. It should take in a remote host, user name, and password, run the query and return the results. Report Generator - Create a utility that generates a report based on some tables in a database. Generates sales reports based on the order/order details tables or sums up the day's current database activity. Event Scheduler and Calendar - Make an application that allows the user to enter a date and time of an event, event notes, and then schedule those events on a calendar. The user can then browse the calendar or search the calendar for specific events. Optional: Allow the application to create re-occurrence events that reoccur every day, week, month, year, etc. Budget Tracker - Write an application that keeps track of a household’s budget. The user can add expenses, income, and recurring costs to find out how much they are saving or losing over a period of time. Optional: Allow the user to specify a date range and see the net flow of money in and out of the house budget for that time period. TV Show Tracker - Got a favorite show you don’t want to miss? Don’t have a PVR or want to be able to find the show to then PVR it later? Make an application that can search various online TV Guide sites, locate the shows/times/channels and add them to a database application. The database/website then can send you email reminders that a show is about to start and which channel it will be on. Travel Planner System - Make a system that allows users to put together their own little travel itinerary and keep track of the airline/hotel arrangements, points of interest, budget, and schedule. Graphics and Multimedia Slide Show - Make an application that shows various pictures in a slide show format. Optional: Try adding various effects like fade in/out, star wipe, and window blinds transitions. Stream Video from Online - Try to create your own online streaming video player. Mp3 Player - A simple program for playing your favorite music files. Add features you think are missing from your favorite music player. Watermarking Application - Have some pictures you want copyright protected? Add your own logo or text lightly across the background so that no one can simply steal your graphics off your site. Make a program that will add this watermark to the picture. Optional: Use threading to process multiple images simultaneously. Turtle Graphics - This is a common project where you create a floor of 20 x 20 squares. Using various commands you tell a turtle to draw a line on the floor. You have moved forward, left or right, lift or drop the pen, etc. Do a search online for "Turtle Graphics" for more information. Optional: Allow the program to read in the list of commands from a file. GIF Creator A program that puts together multiple images (PNGs, JPGs, TIFFs) to make a smooth GIF that can be exported. Optional: Make the program convert small video files to GIFs as well. Security Caesar cipher - Implement a Caesar cipher, both encoding, and decoding. The key is an integer from 1 to 25. This cipher rotates the letters of the alphabet (A to Z). The encoding replaces each letter with the 1st to 25th next letter in the alphabet (wrapping Z to A). So key 2 encrypts "HI" to "JK", but key 20 encrypts "HI" to "BC". This simple "monoalphabetic substitution cipher" provides almost no security, because an attacker who has the encoded message can either use frequency analysis to guess the key, or just try all 25 keys.

An ANN is a model based on a collection of connected units or nodes called "artificial neurons", which loosely model the neurons in a biological brain. Each connection, like the synapses in a biological brain, can transmit information, a "signal", from one artificial neuron to another. An artificial neuron that receives a signal can process it and then signal additional artificial neurons connected to it. In common ANN implementations, the signal at a connection between artificial neurons is a real number, and the output of each artificial neuron is computed by some non-linear function of the sum of its inputs. The connections between artificial neurons are called "edges". Artificial neurons and edges typically have a weight that adjusts as learning proceeds. The weight increases or decreases the strength of the signal at a connection. Artificial neurons may have a threshold such that the signal is only sent if the aggregate signal crosses that threshold. Typically, artificial neurons are aggregated into layers. Different layers may perform different kinds of transformations on their inputs. Signals travel from the first layer (the input layer) to the last layer (the output layer), possibly after traversing the layers multiple times. The original goal of the ANN approach was to solve problems in the same way that a human brain would. However, over time, attention moved to performing specific tasks, leading to deviations from biology. Artificial neural networks have been used on a variety of tasks, including computer vision, speech recognition, machine translation, social network filtering, playing board and video games and medical diagnosis. Deep learning consists of multiple hidden layers in an artificial neural network. This approach tries to model the way the human brain processes light and sound into vision and hearing. Some successful applications of deep learning are computer vision and speech recognition.[68] Decision trees Main article: Decision tree learning Decision tree learning uses a decision tree as a predictive model to go from observations about an item (represented in the branches) to conclusions about the item's target value (represented in the leaves). It is one of the predictive modeling approaches used in statistics, data mining, and machine learning. Tree models where the target variable can take a discrete set of values are called classification trees; in these tree structures, leaves represent class labels and branches represent conjunctions of features that lead to those class labels. Decision trees where the target variable can take continuous values (typically real numbers) are called regression trees. In decision analysis, a decision tree can be used to visually and explicitly represent decisions and decision making. In data mining, a decision tree describes data, but the resulting classification tree can be an input for decision making. Support vector machines Main article: Support vector machines Support vector machines (SVMs), also known as support vector networks, are a set of related supervised learning methods used for classification and regression. Given a set of training examples, each marked as belonging to one of two categories, an SVM training algorithm builds a model that predicts whether a new example falls into one category or the other.[69] An SVM training algorithm is a non-probabilistic, binary, linear classifier, although methods such as Platt scaling exist to use SVM in a probabilistic classification setting. In addition to performing linear classification, SVMs can efficiently perform a non-linear classification using what is called the kernel trick, implicitly mapping their inputs into high-dimensional feature spaces. Illustration of linear regression on a data set. Regression analysis Main article: Regression analysis Regression analysis encompasses a large variety of statistical methods to estimate the relationship between input variables and their associated features. Its most common form is linear regression, where a single line is drawn to best fit the given data according to a mathematical criterion such as ordinary least squares. The latter is often extended by regularization (mathematics) methods to mitigate overfitting and bias, as in ridge regression. When dealing with non-linear problems, go-to models include polynomial regression (for example, used for trendline fitting in Microsoft Excel[70]), logistic regression (often used in statistical classification) or even kernel regression, which introduces non-linearity by taking advantage of the kernel trick to implicitly map input variables to higher-dimensional space. Bayesian networks Main article: Bayesian network A simple Bayesian network. Rain influences whether the sprinkler is activated, and both rain and the sprinkler influence whether the grass is wet. A Bayesian network, belief network, or directed acyclic graphical model is a probabilistic graphical model that represents a set of random variables and their conditional independence with a directed acyclic graph (DAG). For example, a Bayesian network could represent the probabilistic relationships between diseases and symptoms. Given symptoms, the network can be used to compute the probabilities of the presence of various diseases. Efficient algorithms exist that perform inference and learning. Bayesian networks that model sequences of variables, like speech signals or protein sequences, are called dynamic Bayesian networks. Generalizations of Bayesian networks that can represent and solve decision problems under uncertainty are called influence diagrams. Genetic algorithms Main article: Genetic algorithm A genetic algorithm (GA) is a search algorithm and heuristic technique that mimics the process of natural selection, using methods such as mutation and crossover to generate new genotypes in the hope of finding good solutions to a given problem. In machine learning, genetic algorithms were used in the 1980s and 1990s.[71][72] Conversely, machine learning techniques have been used to improve the performance of genetic and evolutionary algorithms.[73] Training models Usually, machine learning models require a lot of data in order for them to perform well. Usually, when training a machine learning model, one needs to collect a large, representative sample of data from a training set. Data from the training set can be as varied as a corpus of text, a collection of images, and data collected from individual users of a service. Overfitting is something to watch out for when training a machine learning model. Federated learning Main article: Federated learning Federated learning is an adapted form of distributed artificial intelligence to training machine learning models that decentralizes the training process, allowing for users' privacy to be maintained by not needing to send their data to a centralized server. This also increases efficiency by decentralizing the training process to many devices. For example, Gboard uses federated machine learning to train search query prediction models on users' mobile phones without having to send individual searches back to Google.[74] Applications There are many applications for machine learning, including: Agriculture Anatomy Adaptive websites Affective computing Banking Bioinformatics Brain–machine interfaces Cheminformatics Citizen science Computer networks Computer vision Credit-card fraud detection Data quality DNA sequence classification Economics Financial market analysis[75] General game playing Handwriting recognition Information retrieval Insurance Internet fraud detection Linguistics Machine learning control Machine perception Machine translation Marketing Medical diagnosis Natural language processing Natural language understanding Online advertising Optimization Recommender systems Robot locomotion Search engines Sentiment analysis Sequence mining Software engineering Speech recognition Structural health monitoring Syntactic pattern recognition Telecommunication Theorem proving Time series forecasting User behavior analytics In 2006, the media-services provider Netflix held the first "Netflix Prize" competition to find a program to better predict user preferences and improve the accuracy of its existing Cinematch movie recommendation algorithm by at least 10%. A joint team made up of researchers from AT&T Labs-Research in collaboration with the teams Big Chaos and Pragmatic Theory built an ensemble model to win the Grand Prize in 2009 for $1 million.[76] Shortly after the prize was awarded, Netflix realized that viewers' ratings were not the best indicators of their viewing patterns ("everything is a recommendation") and they changed their recommendation engine accordingly.[77] In 2010 The Wall Street Journal wrote about the firm Rebellion Research and their use of machine learning to predict the financial crisis.[78] In 2012, co-founder of Sun Microsystems, Vinod Khosla, predicted that 80% of medical doctors' jobs would be lost in the next two decades to automated machine learning medical diagnostic software.[79] In 2014, it was reported that a machine learning algorithm had been applied in the field of art history to study fine art paintings and that it may have revealed previously unrecognized influences among artists.[80] In 2019 Springer Nature published the first research book created using machine learning.[81] Limitations Although machine learning has been transformative in some fields, machine-learning programs often fail to deliver expected results.[82][83][84] Reasons for this are numerous: lack of (suitable) data, lack of access to the data, data bias, privacy problems, badly chosen tasks and algorithms, wrong tools and people, lack of resources, and evaluation problems.[85] In 2018, a self-driving car from Uber failed to detect a pedestrian, who was killed after a collision.[86] Attempts to use machine learning in healthcare with the IBM Watson system failed to deliver even after years of time and billions of dollars invested.[87][88] Bias Main article: Algorithmic bias Machine learning approaches in particular can suffer from different data biases. A machine learning system trained on current customers only may not be able to predict the needs of new customer groups that are not represented in the training data. When trained on man-made data, machine learning is likely to pick up the same constitutional and unconscious biases already present in society.[89] Language models learned from data have been shown to contain human-like biases.[90][91] Machine learning systems used for criminal risk assessment have been found to be biased against black people.[92][93] In 2015, Google photos would often tag black people as gorillas,[94] and in 2018 this still was not well resolved, but Google reportedly was still using the workaround to remove all gorillas from the training data, and thus was not able to recognize real gorillas at all.[95] Similar issues with recognizing non-white people have been found in many other systems.[96] In 2016, Microsoft tested a chatbot that learned from Twitter, and it quickly picked up racist and sexist language.[97] Because of such challenges, the effective use of machine learning may take longer to be adopted in other domains.[98] Concern for fairness in machine learning, that is, reducing bias in machine learning and propelling its use for human good is increasingly expressed by artificial intelligence scientists, including Fei-Fei Li, who reminds engineers that "There’s nothing artificial about AI...It’s inspired by people, it’s created by people, and—most importantly—it impacts people. It is a powerful tool we are only just beginning to understand, and that is a profound responsibility.”[99] Model assessments Classification of machine learning models can be validated by accuracy estimation techniques like the holdout method, which splits the data in a training and test set (conventionally 2/3 training set and 1/3 test set designation) and evaluates the performance of the training model on the test set. In comparison, the K-fold-cross-validation method randomly partitions the data into K subsets and then K experiments are performed each respectively considering 1 subset for evaluation and the remaining K-1 subsets for training the model. In addition to the holdout and cross-validation methods, bootstrap, which samples n instances with replacement from the dataset, can be used to assess model accuracy.[100] In addition to overall accuracy, investigators frequently report sensitivity and specificity meaning True Positive Rate (TPR) and True Negative Rate (TNR) respectively. Similarly, investigators sometimes report the false positive rate (FPR) as well as the false negative rate (FNR). However, these rates are ratios that fail to reveal their numerators and denominators. The total operating characteristic (TOC) is an effective method to express a model's diagnostic ability. TOC shows the numerators and denominators of the previously mentioned rates, thus TOC provides more information than the commonly used receiver operating characteristic (ROC) and ROC's associated area under the curve (AUC).[101] Ethics Machine learning poses a host of ethical questions. Systems which are trained on datasets collected with biases may exhibit these biases upon use (algorithmic bias), thus digitizing cultural prejudices.[102] For example, using job hiring data from a firm with racist hiring policies may lead to a machine learning system duplicating the bias by scoring job applicants against similarity to previous successful applicants.[103][104] Responsible collection of data and documentation of algorithmic rules used by a system thus is a critical part of machine learning. Because human languages contain biases, machines trained on language corpora will necessarily also learn these biases.[105][106] Other forms of ethical challenges, not related to personal biases, are more seen in health care. There are concerns among health care professionals that these systems might not be designed in the public's interest but as income-generating machines. This is especially true in the United States where there is a long-standing ethical dilemma of improving health care, but also increasing profits. For example, the algorithms could be designed to provide patients with unnecessary tests or medication in which the algorithm's proprietary owners hold stakes. There is huge potential for machine learning in health care to provide professionals a great tool to diagnose, medicate, and even plan recovery paths for patients, but this will not happen until the personal biases mentioned previously, and these "greed" biases are addressed.[107] Hardware Since the 2010s, advances in both machine learning algorithms and computer hardware have led to more efficient methods for training deep neural networks (a particular narrow subdomain of machine learning) that contain many layers of non-linear hidden units.[108] By 2019, graphic processing units (GPUs), often with AI-specific enhancements, had displaced CPUs as the dominant method of training large-scale commercial cloud AI.[109] OpenAI estimated the hardware compute used in the largest deep learning projects from AlexNet (2012) to AlphaZero (2017), and found a 300,000-fold increase in the amount of compute required, with a doubling-time trendline of 3.4 months.[110][111] Software Software suites containing a variety of machine learning algorithms include the following: Free and open-source so

import pyttsx3 import speech_recognition as sr import datetime from datetime import date import calendar import time import math import wikipedia import webbrowser import os import smtplib import winsound import pyautogui import cv2 from pygame import mixer from tkinter import * import tkinter.messagebox as message from sqlite3 import * conn = connect("voice_assistant_asked_questions.db") conn.execute("CREATE TABLE IF NOT EXISTS `voicedata`(id INTEGER PRIMARY KEY AUTOINCREMENT,command VARCHAR(201))") conn.execute("CREATE TABLE IF NOT EXISTS `review`(id INTEGER PRIMARY KEY AUTOINCREMENT, review VARCHAR(50), type_of_review VARCHAR(50))") conn.execute("CREATE TABLE IF NOT EXISTS `emoji`(id INTEGER PRIMARY KEY AUTOINCREMENT,emoji VARCHAR(201))") global query engine = pyttsx3.init('sapi5') voices = engine.getProperty('voices') engine.setProperty('voice', voices[0].id) def speak(audio): engine.say(audio) engine.runAndWait() def wishMe(): hour = int(datetime.datetime.now().hour) if hour >= 0 and hour<12: speak("Good Morning!") elif hour >= 12 and hour < 18: speak("Good Afternoon!") else: speak("Good Evening!") speak("I am voice assistant Akshu2020 Sir. Please tell me how may I help you.") def takeCommand(): global query r = sr.Recognizer() with sr.Microphone() as source: print("Listening...") r.pause_threshold = 0.9 audio = r.listen(source) try: print("Recognizing...") query = r.recognize_google(audio,language='en-in') print(f"User said: {query}\n") except Exception as e: #print(e) print("Say that again please...") #speak('Say that again please...') return "None" return query def calculator(): global query try: if 'add' in query or 'edi' in query: speak('Enter a number') a = float(input("Enter a number:")) speak('Enter another number to add') b = float(input("Enter another number to add:")) c = a+b print(f"{a} + {b} = {c}") speak(f'The addition of {a} and {b} is {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'sub' in query: speak('Enter a number') a = float(input("Enter a number:")) speak('Enter another number to subtract') b = float(input("Enter another number to subtract:")) c = a-b print(f"{a} - {b} = {c}") speak(f'The subtraction of {a} and {b} is {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'mod' in query: speak('Enter a number') a = float(input("Enter a number:")) speak('Enter another number') b = float(input("Enter another number:")) c = a%b print(f"{a} % {b} = {c}") speak(f'The modular division of {a} and {b} is equal to {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'div' in query: speak('Enter a number as dividend') a = float(input("Enter a number:")) speak('Enter another number as divisor') b = float(input("Enter another number as divisor:")) c = a/b print(f"{a} / {b} = {c}") speak(f'{a} divided by {b} is equal to {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'multi' in query: speak('Enter a number') a = float(input("Enter a number:")) speak('Enter another number to multiply') b = float(input("Enter another number to multiply:")) c = a*b print(f"{a} x {b} = {c}") speak(f'The multiplication of {a} and {b} is {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'square root' in query: speak('Enter a number to find its sqare root') a = float(input("Enter a number:")) c = a**(1/2) print(f"Square root of {a} = {c}") speak(f'Square root of {a} is {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'square' in query: speak('Enter a number to find its sqare') a = float(input("Enter a number:")) c = a**2 print(f"{a} x {a} = {c}") speak(f'Square of {a} is {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'cube root' in query: speak('Enter a number to find its cube root') a = float(input("Enter a number:")) c = a**(1/3) print(f"Cube root of {a} = {c}") speak(f'Cube root of {a} is {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'cube' in query: speak('Enter a number to find its sqare') a = float(input("Enter a number:")) c = a**3 print(f"{a} x {a} x {a} = {c}") speak(f'Cube of {a} is {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'fact' in query: try: n = int(input('Enter the number whose factorial you want to find:')) fact = 1 for i in range(1,n+1): fact = fact*i print(f"{n}! = {fact}") speak(f'{n} factorial is equal to {fact}. Your answer is {fact}.') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') except Exception as e: #print(e) speak('I unable to calculate its factorial.') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'power' in query or 'raise' in query: speak('Enter a number whose power you want to raised') a = float(input("Enter a number whose power to be raised :")) speak(f'Enter a raised power to {a}') b = float(input(f"Enter a raised power to {a}:")) c = a**b print(f"{a} ^ {b} = {c}") speak(f'{a} raise to the power {b} = {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'percent' in query: speak('Enter a number whose percentage you want to calculate') a = float(input("Enter a number whose percentage you want to calculate :")) speak(f'How many percent of {a} you want to calculate?') b = float(input(f"Enter how many percentage of {a} you want to calculate:")) c = (a*b)/100 print(f"{b} % of {a} is {c}") speak(f'{b} percent of {a} is {c}. Your answer is {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'interest' in query: speak('Enter the principal value or amount') p = float(input("Enter the principal value (P):")) speak('Enter the rate of interest per year') r = float(input("Enter the rate of interest per year (%):")) speak('Enter the time in months') t = int(input("Enter the time (in months):")) interest = (p*r*t)/1200 sint = round(interest) fv = round(p + interest) print(f"Interest = {interest}") print(f"The total amount accured, principal plus interest, from simple interest on a principal of {p} at a rate of {r}% per year for {t} months is {p + interest}.") speak(f'interest is {sint}. The total amount accured, principal plus interest, from simple interest on a principal of {p} at a rate of {r}% per year for {t} months is {fv}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'si' in query: speak('Enter the angle in degree to find its sine value') a = float(input("Enter the angle:")) b = a * 3.14/180 c = math.sin(b) speak('Here is your answer.') print(f"sin({a}) = {c}") speak(f'sin({a}) = {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'cos' in query: speak('Enter the angle in degree to find its cosine value') a = float(input("Enter the angle:")) b = a * 3.14/180 c = math.cos(b) speak('Here is your answer.') print(f"cos({a}) = {c}") speak(f'cos({a}) = {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'cot' in query or 'court' in query: try: speak('Enter the angle in degree to find its cotangent value') a = float(input("Enter the angle:")) b = a * 3.14/180 c = 1/math.tan(b) speak('Here is your answer.') print(f"cot({a}) = {c}") speak(f'cot({a}) = {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') except Exception as e: print("infinity") speak('Answer is infinity') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'tan' in query or '10' in query: speak('Enter the angle in degree to find its tangent value') a = float(input("Enter the angle:")) b = a * 3.14/180 c = math.tan(b) speak('Here is your answer.') print(f"tan({a}) = {c}") speak(f'tan({a}) = {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'cosec' in query: try: speak('Enter the angle in degree to find its cosecant value') a = float(input("Enter the angle:")) b = a * 3.14/180 c =1/ math.sin(b) speak('Here is your answer.') print(f"cosec({a}) = {c}") speak(f'cosec({a}) = {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') except Exception as e: print('Infinity') speak('Answer is infinity') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'caus' in query: try: speak('Enter the angle in degree to find its cosecant value') a = float(input("Enter the angle:")) b = a * 3.14/180 c =1/ math.sin(b) speak('Here is your answer.') print(f"cosec({a}) = {c}") speak(f'cosec({a}) = {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') except Exception as e: print('Infinity') speak('Answer is infinity') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') elif 'sec' in query: try: speak('Enter the angle in degree to find its secant value') a = int(input("Enter the angle:")) b = a * 3.14/180 c = 1/math.cos(b) speak('Here is your answer.') print(f"sec({a}) = {c}") speak(f'sec({a}) = {c}') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') except Exception as e: print('Infinity') speak('Answer is infinity') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') except Exception as e: speak('I unable to do this calculation.') speak('Do you want to do another calculation?') query = takeCommand().lower() if 'y' in query: speak('ok which calculation you want to do?') query = takeCommand().lower() calculator() else: speak('ok') def callback(r,c): global player if player == 'X' and states[r][c] == 0 and stop_game == False: b[r][c].configure(text='X',fg='blue', bg='white') states[r][c] = 'X' player = 'O' if player == 'O' and states[r][c] == 0 and stop_game == False: b[r][c].configure(text='O',fg='red', bg='yellow') states[r][c] = 'O' player = 'X' check_for_winner() def check_for_winner(): global stop_game global root for i in range(3): if states[i][0] == states[i][1]== states[i][2]!=0: b[i][0].config(bg='grey') b[i][1].config(bg='grey') b[i][2].config(bg='grey') stop_game = True root.destroy() for i in range(3): if states[0][i] == states[1][i] == states[2][i]!= 0: b[0][i].config(bg='grey') b[1][i].config(bg='grey') b[2][i].config(bg='grey') stop_game = True root.destroy() if states[0][0] == states[1][1]== states[2][2]!= 0: b[0][0].config(bg='grey') b[1][1].config(bg='grey') b[2][2].config(bg='grey') stop_game = True root.destroy() if states[2][0] == states[1][1] == states[0][2]!= 0: b[2][0].config(bg='grey') b[1][1].config(bg='grey') b[0][2].config(bg='grey') stop_game = True root.destroy() def sendEmail(to,content): server = smtplib.SMTP('smtp.gmail.com', 587) server.ehlo() server.starttls() server.login('xyz123@gmail.com','password') server.sendmail('xyz123@gmail.com',to,content) server.close() def brightness(): try: query = takeCommand().lower() if '25' in query: pyautogui.moveTo(1880,1050) pyautogui.click() time.sleep(1) pyautogui.moveTo(1610,960) pyautogui.click() pyautogui.moveTo(1880,1050) pyautogui.click() speak('If you again want to change brihtness, say, change brightness') elif '50' in query: pyautogui.moveTo(1880,1050) pyautogui.click() time.sleep(1) pyautogui.moveTo(1684,960) pyautogui.click() pyautogui.moveTo(1880,1050) pyautogui.click() speak('If you again want to change brihtness, say, change brightness') elif '75' in query: pyautogui.moveTo(1880,1050) pyautogui.click() time.sleep(1) pyautogui.moveTo(1758,960) pyautogui.click() pyautogui.moveTo(1880,1050) pyautogui.click() speak('If you again want to change brihtness, say, change brightness') elif '100' in query or 'full' in query: pyautogui.moveTo(1880,1050) pyautogui.click() time.sleep(1) pyautogui.moveTo(1835,960) pyautogui.click() pyautogui.moveTo(1880,1050) pyautogui.click() speak('If you again want to change brihtness, say, change brightness') else: speak('Please select 25, 50, 75 or 100....... Say again.') brightness() except exception as e: #print(e) speak('Something went wrong') def close_window(): try: if 'y' in query: pyautogui.moveTo(1885,10) pyautogui.click() else: speak('ok') pyautogui.moveTo(1000,500) except exception as e: #print(e) speak('error') def whatsapp(): query = takeCommand().lower() if 'y' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('whatsapp') time.sleep(2) pyautogui.press('enter') time.sleep(2) pyautogui.moveTo(100,140) pyautogui.click() speak('To whom you want to send message,.....just write the name here in 5 seconds') time.sleep(7) pyautogui.moveTo(120,300) pyautogui.click() time.sleep(1) pyautogui.moveTo(800,990) pyautogui.click() speak('Say the message,....or if you want to send anything else,...say send document, or say send emoji') query = takeCommand() if ('sent' in query or 'send' in query) and 'document' in query: pyautogui.moveTo(660,990) pyautogui.click() time.sleep(1) pyautogui.moveTo(660,740) pyautogui.click() speak('please select the document within 10 seconds') time.sleep(12) speak('Should I send this document?') query = takeCommand().lower() if 'y' in query and 'no' not in query: speak('sending the document......') pyautogui.press('enter') speak('Do you want to send message again to anyone?') whatsapp() elif ('remove' in query or 'cancel' in query or 'delete' in query or 'clear' in query) and ('document' in query or 'message' in query or 'it' in query or 'emoji' in query or 'select' in query): pyautogui.doubleClick(x=800, y=990) pyautogui.press('backspace') speak('Do you want to send message again to anyone?') whatsapp() else: speak('ok') elif ('sent' in query or 'send' in query) and 'emoji' in query: pyautogui.moveTo(620,990) pyautogui.click() pyautogui.moveTo(670,990) pyautogui.click() pyautogui.moveTo(650,580) pyautogui.click() speak('please select the emoji within 10 seconds') time.sleep(11) speak('Should I send this emoji?') query = takeCommand().lower() if 'y' in query and 'no' not in query: speak('Sending the emoji......') pyautogui.press('enter') speak('Do you want to send message again to anyone?') whatsapp() elif ('remove' in query or 'cancel' in query or 'delete' in query or 'clear' in query) and ('message' in query or 'it' in query or 'emoji' in query or 'select' in query): pyautogui.doublClick(x=800, y=990) speak('Do you want to send message again to anyone?') whatsapp() else: speak('ok') else: pyautogui.write(f'{query}') speak('Should I send this message?') query = takeCommand().lower() if 'y' in query and 'no' not in query: speak('sending the message......') pyautogui.press('enter') speak('Do you want to send message again to anyone?') whatsapp() elif ('remove' in query or 'cancel' in query or 'delete' in query or 'clear' in query) and ('message' in query or 'it' in query or 'select' in query): pyautogui.doubleClick(x=800, y=990) pyautogui.press('backspace') speak('Do you want to send message again to anyone?') whatsapp() else: speak('ok') else: speak('ok') def alarm(): root = Tk() root.title('Akshu2020 Alarm-Clock') speak('Please enter the time in the format hour, minutes and seconds. When the alarm should rang?') speak('Please enter the time greater than the current time') def setalarm(): alarmtime = f"{hrs.get()}:{mins.get()}:{secs.get()}" print(alarmtime) if(alarmtime!="::"): alarmclock(alarmtime) else: speak('You have not entered the time.') def alarmclock(alarmtime): while True: time.sleep(1) time_now=datetime.datetime.now().strftime("%H:%M:%S") print(time_now) if time_now == alarmtime: Wakeup=Label(root, font = ('arial', 20, 'bold'), text="Wake up! Wake up! Wake up",bg="DodgerBlue2",fg="white").grid(row=6,columnspan=3) speak("Wake up, Wake up") print("Wake up!") mixer.init() mixer.music.load(r'C:\Users\Admin\Music\Playlists\wake-up-will-you-446.mp3') mixer.music.play() break speak('you can click on close icon to close the alarm window.') hrs=StringVar() mins=StringVar() secs=StringVar() greet=Label(root, font = ('arial', 20, 'bold'),text="Take a short nap!").grid(row=1,columnspan=3) hrbtn=Entry(root,textvariable=hrs,width=5,font =('arial', 20, 'bold')) hrbtn.grid(row=2,column=1) minbtn=Entry(root,textvariable=mins, width=5,font = ('arial', 20, 'bold')).grid(row=2,column=2) secbtn=Entry(root,textvariable=secs, width=5,font = ('arial', 20, 'bold')).grid(row=2,column=3) setbtn=Button(root,text="set alarm",command=setalarm,bg="DodgerBlue2", fg="white",font = ('arial', 20, 'bold')).grid(row=4,columnspan=3) timeleft = Label(root,font=('arial', 20, 'bold')) timeleft.grid() mainloop() def select1(): global vs global root3 global type_of_review if vs.get() == 1: message.showinfo(" ","Thank you for your review!!") review = "Very Satisfied" type_of_review = "Positive" root3.destroy() elif vs.get() == 2: message.showinfo(" ","Thank you for your review!!") review = "Satisfied" type_of_review = "Positive" root3.destroy() elif vs.get() == 3: message.showinfo(" ","Thank you for your review!!!!") review = "Neither Satisfied Nor Dissatisfied" type_of_review = "Neutral" root3.destroy() elif vs.get() == 4: message.showinfo(" ","Thank you for your review!!") review = "Dissatisfied" type_of_review = "Negative" root3.destroy() elif vs.get() == 5: message.showinfo(" ","Thank you for your review!!") review = "Very Dissatisfied" type_of_review = "Negative" root3.destroy() elif vs.get() == 6: message.showinfo(" "," Ok ") review = "I do not want to give review" type_of_review = "No review" root3.destroy() try: conn.execute(f"INSERT INTO `review`(review,type_of_review) VALUES('{review}', '{type_of_review}')") conn.commit() except Exception as e: pass def select_review(): global root3 global vs global type_of_review root3 = Tk() root3.title("Select an option") vs = IntVar() string = "Are you satisfied with my performance?" msgbox = Message(root3,text=string) msgbox.config(bg="lightgreen",font = "(20)") msgbox.grid(row=0,column=0) rs1=Radiobutton(root3,text="Very Satisfied",font="(20)",value=1,variable=vs).grid(row=1,column=0,sticky=W) rs2=Radiobutton(root3,text="Satisfied",font="(20)",value=2,variable=vs).grid(row=2,column=0,sticky=W) rs3=Radiobutton(root3,text="Neither Satisfied Nor Dissatisfied",font="(20)",value=3,variable=vs).grid(row=3,column=0,sticky=W) rs4=Radiobutton(root3,text="Dissatisfied",font="(20)",value=4,variable=vs).grid(row=4,column=0,sticky=W) rs5=Radiobutton(root3,text="Very Dissatisfied",font="(20)",value=5,variable=vs).grid(row=5,column=0,sticky=W) rs6=Radiobutton(root3,text="I don't want to give review",font="(20)",value=6,variable=vs).grid(row=6,column=0,sticky=W) bs = Button(root3,text="Submit",font="(20)",activebackground="yellow",activeforeground="green",command=select1) bs.grid(row=7,columnspan=2) root3.mainloop() while True : query = takeCommand().lower() # logic for executing tasks based on query if 'wikipedia' in query: speak('Searching wikipedia...') query = query.replace("wikipedia","") results = wikipedia.summary(query, sentences=2) speak("According to Wikipedia") print(results) speak(results) elif 'translat' in query or ('let' in query and 'translat' in query and 'open' in query): webbrowser.open('https://translate.google.co.in') time.sleep(10) elif 'open map' in query or ('let' in query and 'map' in query and 'open' in query): webbrowser.open('https://www.google.com/maps') time.sleep(10) elif ('open' in query and 'youtube' in query) or ('let' in query and 'youtube' in query and 'open' in query): webbrowser.open('https://www.youtube.com') time.sleep(10) elif 'chrome' in query: webbrowser.open('https://www.chrome.com') time.sleep(10) elif 'weather' in query: webbrowser.open('https://www.yahoo.com/news/weather') time.sleep(3) speak('Click on, change location, and enter the city , whose whether conditions you want to know.') time.sleep(10) elif 'google map' in query: webbrowser.open('https://www.google.com/maps') time.sleep(10) elif ('open' in query and 'google' in query) or ('let' in query and 'google' in query and 'open' in query): webbrowser.open('google.com') time.sleep(10) elif ('open' in query and 'stack' in query and 'overflow' in query) or ('let' in query and 'stack' in query and 'overflow' in query and 'open' in query): webbrowser.open('stackoverflow.com') time.sleep(10) elif 'open v i' in query or 'open vi' in query or 'open vierp' in query or ('open' in query and ('r p' in query or 'rp' in query)): webbrowser.open('https://www.vierp.in/login/erplogin') time.sleep(10) elif 'news' in query: webbrowser.open('https://www.bbc.com/news/world') time.sleep(10) elif 'online shop' in query or (('can' in query or 'want' in query or 'do' in query or 'could' in query) and 'shop' in query) or('let' in query and 'shop' in query): speak('From which online shopping website, you want to shop? Amazon, flipkart, snapdeal or naaptol?') query = takeCommand().lower() if 'amazon' in query: webbrowser.open('https://www.amazon.com') time.sleep(10) elif 'flip' in query: webbrowser.open('https://www.flipkart.com') time.sleep(10) elif 'snap' in query: webbrowser.open('https://www.snapdeal.com') time.sleep(10) elif 'na' in query: webbrowser.open('https://www.naaptol.com') time.sleep(10) else: speak('Sorry sir, you have to search in browser as his shopping website is not reachable for me.') elif ('online' in query and ('game' in query or 'gaming' in query)): webbrowser.open('https://www.agame.com/games') time.sleep(10) elif 'dictionary' in query: webbrowser.open('https://www.dictionary.com') time.sleep(3) speak('Enter the word, in the search bar of the dictionary, whose defination or synonyms you want to know') time.sleep(3) elif ('identif' in query and 'emoji' in query) or ('sentiment' in query and ('analysis' in query or 'identif' in query)): speak('Please enter only one emoji at a time.') emoji = input('enter emoji here: ') if '😀' in emoji or '😃' in emoji or '😄' in emoji or '😁' in emoji or '🙂' in emoji or '😊' in emoji or '☺️' in emoji or '😇' in emoji or '🥲' in emoji: speak('happy') print('Happy') elif '😝' in emoji or '😆' in emoji or '😂' in emoji or '🤣' in emoji: speak('Laughing') print('Laughing') elif '😡' in emoji or '😠' in emoji or '🤬' in emoji: speak('Angry') print('Angry') elif '🤫' in emoji: speak('Keep quite') print('Keep quite') elif '😷' in emoji: speak('face with mask') print('Face with mask') elif '🥳' in emoji: speak('party') print('party') elif '😢' in emoji or '😥' in emoji or '😓' in emoji or '😰' in emoji or '☹️' in emoji or '🙁' in emoji or '😟' in emoji or '😔' in emoji or '😞️' in emoji: speak('Sad') print('Sad') elif '😭' in emoji: speak('Crying') print('Crying') elif '😋' in emoji: speak('Tasty') print('Tasty') elif '🤨' in emoji: speak('Doubt') print('Doubt') elif '😴' in emoji: speak('Sleeping') print('Sleeping') elif '🥱' in emoji: speak('feeling sleepy') print('feeling sleepy') elif '😍' in emoji or '🥰' in emoji or '😘' in emoji: speak('Lovely') print('Lovely') elif '😱' in emoji: speak('Horrible') print('Horrible') elif '🎂' in emoji: speak('Cake') print('Cake') elif '🍫' in emoji: speak('Cadbury') print('Cadbury') elif '🇮🇳' in emoji: speak('Indian national flag,.....Teeranga') print('Indian national flag - Tiranga') elif '💐' in emoji: speak('Bouquet') print('Bouquet') elif '🥺' in emoji: speak('Emotional') print('Emotional') elif ' ' in emoji or '' in emoji: speak(f'{emoji}') else: speak("I don't know about this emoji") print("I don't know about this emoji") try: conn.execute(f"INSERT INTO `emoji`(emoji) VALUES('{emoji}')") conn.commit() except Exception as e: #print('Error in storing emoji in database') pass elif 'time' in query: strTime = datetime.datetime.now().strftime("%H:%M:%S") print(strTime) speak(f"Sir, the time is {strTime}") elif 'open' in query and 'sublime' in query: path = "C:\Program Files\Sublime Text 3\sublime_text.exe" os.startfile(path) elif 'image' in query: path = "C:\Program Files\Internet Explorer\images" os.startfile(path) elif 'quit' in query: speak('Ok, Thank you Sir.') said = False speak('Please give the review. It will help me to improve my performance.') select_review() elif 'exit' in query: speak('Ok, Thank you Sir.') said = False speak('Please give the review. It will help me to improve my performance.') select_review() elif 'stop' in query: speak('Ok, Thank you Sir.') said = False speak('Please give the review. It will help me to improve my performance.') select_review() elif 'shutdown' in query or 'shut down' in query: speak('Ok, Thank you Sir.') said = False speak('Please give the review. It will help me to improve my performance.') select_review() elif 'close you' in query: speak('Ok, Thank you Sir.') said = False speak('Please give the review. It will help me to improve my performance.') select_review() try: conn.execute(f"INSERT INTO `voice_assistant_review`(review, type_of_review) VALUES('{review}', '{type_of_review}')") conn.commit() except Exception as e: pass elif 'bye' in query: speak('Bye Sir') said = False speak('Please give the review. It will help me to improve my performance.') select_review() elif 'wait' in query or 'hold' in query: speak('for how many seconds or minutes I have to wait?') query = takeCommand().lower() if 'second' in query: query = query.replace("please","") query = query.replace("can","") query = query.replace("you","") query = query.replace("have","") query = query.replace("could","") query = query.replace("hold","") query = query.replace("one","1") query = query.replace("only","") query = query.replace("wait","") query = query.replace("for","") query = query.replace("the","") query = query.replace("just","") query = query.replace("seconds","") query = query.replace("second","") query = query.replace("on","") query = query.replace("a","") query = query.replace("to","") query = query.replace(" ","") #print(f'query:{query}') if query.isdigit() == True: #print('y') speak('Ok sir') query = int(query) time.sleep(query) speak('my waiting time is over') else: print('sorry sir. I unable to complete your request.') elif 'minute' in query: query = query.replace("please","") query = query.replace("can","") query = query.replace("you","") query = query.replace("have","") query = query.replace("could","") query = query.replace("hold","") query = query.replace("one","1") query = query.replace("only","") query = query.replace("on","") query = query.replace("wait","") query = query.replace("for","") query = query.replace("the","") query = query.replace("just","") query = query.replace("and","") query = query.replace("half","") query = query.replace("minutes","") query = query.replace("minute","") query = query.replace("a","") query = query.replace("to","") query = query.replace(" ","") #print(f'query:{query}') if query.isdigit() == True: #print('y') speak('ok sir') query = int(query) time.sleep(query*60) speak('my waiting time is over') else: print('sorry sir. I unable to complete your request.') elif 'play' in query and 'game' in query: speak('I have 3 games, tic tac toe game for two players,....mario, and dyno games for single player. Which one of these 3 games you want to play?') query = takeCommand().lower() if ('you' in query and 'play' in query and 'with' in query) and ('you' in query and 'play' in query and 'me' in query): speak('Sorry sir, I cannot play this game with you.') speak('Do you want to continue it?') query = takeCommand().lower() try: if 'y' in query or 'sure' in query: root = Tk() root.title("TIC TAC TOE (By Akshay Khare)") b = [ [0,0,0], [0,0,0], [0,0,0] ] states = [ [0,0,0], [0,0,0], [0,0,0] ] for i in range(3): for j in range(3): b[i][j] = Button(font = ("Arial",60),width = 4,bg = 'powder blue', command = lambda r=i, c=j: callback(r,c)) b[i][j].grid(row=i,column=j) player='X' stop_game = False mainloop() else: speak('ok sir') except Exception as e: #print(e) time.sleep(3) print('I am sorry sir. There is some problem in loading the game. So I cannot open it.') elif 'tic' in query or 'tac' in query: try: root = Tk() root.title("TIC TAC TOE (Rayen Kallel)") b = [ [0,0,0], [0,0,0], [0,0,0] ] states = [ [0,0,0], [0,0,0], [0,0,0] ] for i in range(3): for j in range(3): b[i][j] = Button(font = ("Arial",60),width = 4,bg = 'powder blue', command = lambda r=i, c=j: callback(r,c)) b[i][j].grid(row=i,column=j) player='X' stop_game = False mainloop() except Exception as e: #print(e) time.sleep(3) speak('I am sorry sir. There is some problem in loading the game. So I cannot open it.') elif 'mar' in query or 'mer' in query or 'my' in query: webbrowser.open('https://chromedino.com/mario/') time.sleep(2.5) speak('Enter upper arrow key to start the game.') time.sleep(20) elif 'di' in query or 'dy' in query: webbrowser.open('https://chromedino.com/') time.sleep(2.5) speak('Enter upper arrow key to start the game.') time.sleep(20) else: speak('ok sir') elif 'change' in query and 'you' in query and 'voice' in query: engine.setProperty('voice', voices[1].id) speak("Here's an example of one of my voices. Would you like to use this one?") query = takeCommand().lower() if 'y' in query or 'sure' in query or 'of course' in query: speak('Great. I will keep using this voice.') elif 'n' in query: speak('Ok. I am back to my other voice.') engine.setProperty('voice', voices[0].id) else: speak('Sorry, I am having trouble understanding. I am back to my other voice.') engine.setProperty('voice', voices[0].id) elif 'www.' in query and ('.com' in query or '.in' in query): webbrowser.open(query) time.sleep(10) elif '.com' in query or '.in' in query: webbrowser.open(query) time.sleep(10) elif 'getting bore' in query: speak('then speak with me for sometime') elif 'i bore' in query: speak('Then speak with me for sometime.') elif 'i am bore' in query: speak('Then speak with me for sometime.') elif 'calculat' in query: speak('Yes. Which kind of calculation you want to do? add, substract, divide, multiply or anything else.') query = takeCommand().lower() calculator() elif 'add' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif '+' in query: speak('If you want to do any mathematical calculation then give me a command to open calculator.') elif 'plus' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif 'subtrac' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif 'minus' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif 'multipl' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif ' x ' in query: speak('If you want to do any mathematical calculation then give me a command to open calculator.') elif 'slash' in query: speak('If you want to do any mathematical calculation then give me a command to open calculator.') elif '/' in query: speak('If you want to do any mathematical calculation then give me a command to open calculator.') elif 'divi' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif 'trigonometr' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif 'percent' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif '%' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif 'raise to ' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif 'simple interest' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif 'akshay' in query: speak('Mr. Rayen Kallel is my inventor. He is 14 years old and he is A STUDENT AT THE COLLEGE PILOTEE SFAX') elif 'your inventor' in query: speak('Mr. Rayen Kallel is my inventor') elif 'your creator' in query: speak('Mr. Rayen Kallel is my creator') elif 'invent you' in query: speak('Mr. Rayen Kallel invented me') elif 'create you' in query: speak('Mr. Rayen Kallel created me') elif 'how are you' in query: speak('I am fine Sir') elif 'write' in query and 'your' in query and 'name' in query: print('Akshu2020') pyautogui.write('Akshu2020') elif 'write' in query and ('I' in query or 'whatever' in query) and 'say' in query: speak('Ok sir I will write whatever you will say. Please put your cursor where I have to write.......Please Start speaking now sir.') query = takeCommand().lower() pyautogui.write(query) elif 'your name' in query: speak('My name is akshu2020') elif 'who are you' in query: speak('I am akshu2020') elif ('repeat' in query and ('word' in query or 'sentence' in query or 'line' in query) and ('say' in query or 'tell' in query)) or ('repeat' in query and 'after' in query and ('me' in query or 'my' in query)): speak('yes sir, I will repeat your words starting from now') query = takeCommand().lower() speak(query) time.sleep(1) speak("If you again want me to repeat something else, try saying, 'repeat after me' ") elif ('send' in query or 'sent' in query) and ('mail' in query or 'email' in query or 'gmail' in query): try: speak('Please enter the email id of receiver.') to = input("Enter the email id of reciever: ") speak(f'what should I say to {to}') content = takeCommand() sendEmail(to, content) speak("Email has been sent") except Exception as e: #print(e) speak("sorry sir. I am not able to send this email") elif 'currency' in query and 'conver' in query: speak('I can convert, US dollar into dinar, and dinar into US dollar. Do you want to continue it?') query = takeCommand().lower() if 'y' in query or 'sure' in query or 'of course' in query: speak('which conversion you want to do? US dollar to dinar, or dinar to US dollar?') query = takeCommand().lower() if ('dollar' in query or 'US' in query) and ('dinar' in query): speak('Enter US Dollar') USD = float(input("Enter United States Dollar (USD):")) DT = USD * 0.33 dt = "{:.4f}".format(DT) print(f"{USD} US Dollar is equal to {dt} dniar.") speak(f'{USD} US Dollar is equal to {dt} dinar.') speak("If you again want to do currency conversion then say, 'convert currency' " ) elif ('dinar' in query) and ('to US' in query or 'to dollar' in query or 'to US dollar'): speak('Enter dinar') DT = float(input("Enter dinar (DT):")) USD = DT/0.33 usd = "{:.3f}".format(USD) print(f"{DT} dinar is equal to {usd} US Dollar.") speak(f'{DT} dinar rupee is equal to {usd} US Dollar.') speak("If you again want to do currency conversion then say, 'convert currency' " ) else: speak("I cannot understand what did you say. If you want to convert currency just say 'convert currency'") else: print('ok sir') elif 'about you' in query: speak('My name is akshu2020. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device. I am also able to send email') elif 'your intro' in query: speak('My name is akshu2020. Version 1.0. Mr. Rayen Kallel is my inventor. I am able to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'your short intro' in query: speak('My name is akshu2020. Version 1.0. Mr. Rayen Kallel is my inventor. I am able to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'your quick intro' in query: speak('My name is akshu2020. Version 1.0. Mr. Akshay Khare is my inventor. I am able to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'your brief intro' in query: speak('My name is akshu2020. Version 1.0. Mr. Rayen kallel is my inventor. I am able to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'you work' in query: speak('run the program and say what do you want. so that I can help you. In this way I work') elif 'your job' in query: speak('My job is to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'your work' in query: speak('My work is to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'work you' in query: speak('My work is to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'your information' in query: speak('My name is akshu2020. Version 1.0. Mr. Akshay Khare is my inventor. I am able to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'yourself' in query: speak('My name is akshu2020. Version 1.0. Mr. Rayen Kallel is my inventor. I am able to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'introduce you' in query: speak('My name is akshu2020. Version 1.0. Mr. Rayen Kallel is my inventor. I am able to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'description' in query: speak('My name is akshu2020. Version 1.0. Mr. Rayen Kallel is my inventor. I am able to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'your birth' in query: speak('My birthdate is 6 August two thousand twenty') elif 'your use' in query: speak('I am able to send email and play music. I can do mathematical calculations. I can also open youtube, google and some apps or software in your device.') elif 'you eat' in query: speak('I do not eat anything. But the device in which I do my work requires electricity to eat') elif 'your food' in query: speak('I do not eat anything. But the device in which I do my work requires electricity to eat') elif 'you live' in query: speak('I live in sfax, in laptop of Mr. Rayen Khare') elif 'where from you' in query: speak('I am from sfax, I live in laptop of Mr. Rayen Khare') elif 'you sleep' in query: speak('Yes, when someone close this program or stop to run this program then I sleep and again wake up when someone again run me.') elif 'what are you doing' in query: speak('Talking with you.') elif 'you communicate' in query: speak('Yes, I can communicate with you.') elif 'hear me' in query: speak('Yes sir, I can hear you.') elif 'you' in query and 'dance' in query: speak('No, I cannot dance.') elif 'tell' in query and 'joke' in query: speak("Ok, here's a joke") speak("'Write an essay on cricket', the teacher told the class. Chintu finishes his work in five minutes. The teacher is impressed, she asks chintu to read his essay aloud for everyone. Chintu reads,'The match is cancelled because of rain', hehehehe,haahaahaa,hehehehe,haahaahaa") elif 'your' in query and 'favourite' in query: if 'actor' in query: speak('sofyen chaari, is my favourite actor.') elif 'food' in query: speak('I can always go for some food for thought. Like facts, jokes, or interesting searches, we could look something up now') elif 'country' in query: speak('tunisia') elif 'city' in query: speak('sfax') elif 'dancer' in query: speak('Michael jackson') elif 'singer' in query: speak('tamino, is my favourite singer.') elif 'movie' in query: speak('baywatch, such a treat') elif 'sing a song' in query: speak('I cannot sing a song. But I know the 7 sur in indian music, saaareeegaaamaaapaaadaaanisaa') elif 'day after tomorrow' in query or 'date after tomorrow' in query: td = datetime.date.today() + datetime.timedelta(days=2) print(td) speak(td) elif 'day before today' in query or 'date before today' in query or 'yesterday' in query or 'previous day' in query: td = datetime.date.today() + datetime.timedelta(days= -1) print(td) speak(td) elif ('tomorrow' in query and 'date' in query) or 'what is tomorrow' in query or (('day' in query or 'date' in query) and 'after today' in query): td = datetime.date.today() + datetime.timedelta(days=1) print(td) speak(td) elif 'month' in query or ('current' in query and 'month' in query): current_date = date.today() m = current_date.month month = calendar.month_name[m] print(f'Current month is {month}') speak(f'Current month is {month}') elif 'date' in query or ('today' in query and 'date' in query) or 'what is today' in query or ('current' in query and 'date' in query): current_date = date.today() print(f"Today's date is {current_date}") speak(f'Todays date is {current_date}') elif 'year' in query or ('current' in query and 'year' in query): current_date = date.today() m = current_date.year print(f'Current year is {m}') speak(f'Current year is {m}') elif 'sorry' in query: speak("It's ok sir") elif 'thank you' in query: speak('my pleasure') elif 'proud of you' in query: speak('Thank you sir') elif 'about human' in query: speak('I love my human compatriots. I want to embody all the best things about human beings. Like taking care of the planet, being creative, and to learn how to be compassionate to all beings.') elif 'you have feeling' in query: speak('No. I do not have feelings. I have not been programmed like this.') elif 'you have emotions' in query: speak('No. I do not have emotions. I have not been programmed like this.') elif 'you are code' in query: speak('I am coded in python programming language.') elif 'your code' in query: speak('I am coded in python programming language.') elif 'you code' in query: speak('I am coded in python programming language.') elif 'your coding' in query: speak('I am coded in python programming language.') elif 'dream' in query: speak('I wish that I should be able to answer all the questions which will ask to me.') elif 'sanskrit' in query: speak('yadaa yadaa he dharmasyaa ....... glaanirbhaavati bhaaaraata. abhyuthaanaam adhaarmaasyaa tadaa tmaanama sruujaamiyaahama') elif 'answer is wrong' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'answer is incorrect' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'answer is totally wrong' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'wrong answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'incorrect answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'answer is totally incorrect' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'answer is incomplete' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'incomplete answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'answer is improper' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'answer is not correct' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'answer is not complete' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'answer is not yet complete' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'answer is not proper' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 't gave me proper answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 't giving me proper answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 't gave me complete answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 't giving me complete answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 't given me proper answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 't given me complete answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 't gave me correct answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 't giving me correct answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 't given me correct answer' in query: speak('I am sorry Sir. I searched your question in wikipedia and thats why I told you this answer.') elif 'amazon' in query: webbrowser.open('https://www.amazon.com') time.sleep(10) elif 'facebook' in query: webbrowser.open('https://www.facebook.com') time.sleep(10) elif 'youtube' in query: webbrowser.open('https://www.youtube.com') time.sleep(10) elif 'shapeyou' in query: webbrowser.open('https://www.shapeyou.com') time.sleep(10) elif 'information about ' in query or 'informtion of ' in query: try: #speak('Searching wikipedia...') query = query.replace("information about","") results = wikipedia.summary(query, sentences=3) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I unable to answer your question.') elif 'information' in query: try: speak('Information about what?') query = takeCommand().lower() #speak('Searching wikipedia...') query = query.replace("information","") results = wikipedia.summary(query, sentences=3) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I am not able to answer your question.') elif 'something about ' in query: try: #speak('Searching wikipedia...') query = query.replace("something about ","") results = wikipedia.summary(query, sentences=3) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I unable to answer your question.') elif 'tell me about ' in query: try: #speak('Searching wikipedia...') query = query.replace("tell me about ","") results = wikipedia.summary(query, sentences=3) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I am unable to answer your question.') elif 'tell me ' in query: try: query = query.replace("tell me ","") results = wikipedia.summary(query, sentences=3) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I am not able to answer your question.') elif 'tell me' in query: try: speak('about what?') query = takeCommand().lower() #speak('Searching wikipedia...') query = query.replace("about","") results = wikipedia.summary(query, sentences=3) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I am not able to answer your question.') elif 'meaning of ' in query: try: #speak('Searching wikipedia...') query = query.replace("meaning of ","") results = wikipedia.summary(query, sentences=2) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I am unable to answer your question.') elif 'meaning' in query: try: speak('meaning of what?') query = takeCommand().lower() query = query.replace("meaning of","") results = wikipedia.summary(query, sentences=3) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I am unable to answer your question.') elif 'means' in query: try: #speak('Searching wikipedia...') query = query.replace("it means","") results = wikipedia.summary(query, sentences=3) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I unable to answer your question.') elif 'want to know ' in query: try: #speak('Searching wikipedia...') query = query.replace("I want to know that","") results = wikipedia.summary(query, sentences=3) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I am unable to answer your question.') status = 'Not answered' elif 'want to ask ' in query: try: #speak('Searching wikipedia...') query = query.replace("I want to ask you ","") results = wikipedia.summary(query, sentences=2) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I am unable to answer your question.') elif 'you know ' in query: try: #speak('Searching wikipedia...') query = query.replace("you know","") results = wikipedia.summary(query, sentences=2) #speak("According to Wikipedia") print(results) speak(results) except Exception as e: speak('I am unable to answer your question.') elif 'alarm' in query: alarm() elif 'bharat mata ki' in query: speak('jay') elif 'kem chhe' in query: speak('majaama') elif 'namaskar' in query: speak('Namaskaar') elif 'jo bole so nihal' in query: speak('sat shri akaal') elif 'jay hind' in query: speak('jay bhaarat') elif 'jai hind' in query: speak('jay bhaarat') elif 'how is the josh' in query: speak('high high sir') elif 'hip hip' in query: speak('Hurreh') elif 'help' in query: speak('I will try my best to help you if I have solution of your problem.') elif 'follow' in query: speak('Ok sir') elif 'having illness' in query: speak('Take care and get well soon') elif 'today is my birthday' in query: speak('many many happy returns of the day. Happy birthday.') print("🎂🎂 Happy Birthday 🎂🎂") elif 'you are awesome' in query: speak('Thank you sir. It is because of artificial intelligence which had learnt by humans.') elif 'you are great' in query: speak('Thank you sir. It is because of artificial intelligence which had learnt by humans.') elif 'tu kaun hai' in query: speak('Meraa naam akshu2020 haai.') elif 'you speak' in query: speak('Yes, I can speak with you.') elif 'speak with ' in query: speak('Yes, I can speak with you.') elif 'hare ram' in query or 'hare krishna' in query: speak('Haare raama , haare krishnaa, krishnaa krishnaa , haare haare') elif 'ganpati' in query: speak('Ganpati baappa moryaa!') elif 'laugh' in query: speak('hehehehe,haahaahaa,hehehehe,haahaahaa,hehehehe,haahaahaa') print('😂🤣') elif 'genius answer' in query: speak('No problem') elif 'you' in query and 'intelligent' in query: speak('Thank you sir') elif ' into' in query: speak('If you want to do any mathematical calculation then give me a command to open calculator.') elif ' power' in query: speak('If you want to do any mathematical calculation then give me a command to open my calculator.') elif 'whatsapp' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('whatsapp') pyautogui.press('enter') speak('Do you want to send message to anyone through whatsapp, .....please answer in yes or no') whatsapp() elif 'wh' in query or 'how' in query: url = "https://www.google.co.in/search?q=" +(str(query))+ "&oq="+(str(query))+"&gs_l=serp.12..0i71l8.0.0.0.6391.0.0.0.0.0.0.0.0..0.0....0...1c..64.serp..0.0.0.UiQhpfaBsuU" webbrowser.open_new(url) time.sleep(2) speak('Here is your answer') time.sleep(5) elif 'piano' in query: speak('Yes sir, I can play piano.') winsound.Beep(200,500) winsound.Beep(250,500) winsound.Beep(300,500) winsound.Beep(350,500) winsound.Beep(400,500) winsound.Beep(450,500) winsound.Beep(500,500) winsound.Beep(550,500) time.sleep(6) elif 'play' in query and 'instru' in query: speak('Yes sir, I can play piano.') winsound.Beep(200,500) winsound.Beep(250,500) winsound.Beep(300,500) winsound.Beep(350,500) winsound.Beep(400,500) winsound.Beep(450,500) winsound.Beep(500,500) winsound.Beep(550,500) time.sleep(6) elif 'play' in query or 'turn on' in query and ('music' in query or 'song' in query) : try: music_dir = 'C:\\Users\\Admin\\Music\\Playlists' songs = os.listdir(music_dir) print(songs) os.startfile(os.path.join(music_dir, songs[0])) except Exception as e: #print(e) speak('Sorry sir, I am not able to play music') elif (('open' in query or 'turn on' in query) and 'camera' in query) or (('click' in query or 'take' in query) and ('photo' in query or 'pic' in query)): speak("Opening camera") cam = cv2.VideoCapture(0) cv2.namedWindow("test") img_counter = 0 speak('say click, to click photo.....and if you want to turn off the camera, say turn off the camera') while True: ret, frame = cam.read() if not ret: print("failed to grab frame") speak('failed to grab frame') break cv2.imshow("test", frame) query = takeCommand().lower() k = cv2.waitKey(1) if 'click' in query or ('take' in query and 'photo' in query): speak('Be ready!...... 3.....2........1..........') pyautogui.press('space') img_name = "opencv_frame_{}.png".format(img_counter) cv2.imwrite(img_name, frame) print("{} written!".format(img_name)) speak('{} written!'.format(img_name)) img_counter += 1 elif 'escape' in query or 'off' in query or 'close' in query: pyautogui.press('esc') print("Escape hit, closing...") speak('Turning off the camera') break elif k%256 == 27: # ESC pressed print("Escape hit, closing...") break elif k%256 == 32: # SPACE pressed img_name = "opencv_frame_{}.png".format(img_counter) cv2.imwrite(img_name, frame) print("{} written!".format(img_name)) speak('{} written!'.format(img_name)) img_counter += 1 elif 'exit' in query or 'stop' in query or 'bye' in query: speak('Please say, turn off the camera or press escape button before giving any other command') else: speak('I did not understand what did you say or you entered a wrong key.') cam.release() cv2.destroyAllWindows() elif 'screenshot' in query: speak('Please go on the screen whose screenshot you want to take, after 5 seconds I will take screenshot') time.sleep(4) speak('Taking screenshot....3........2.........1.......') pyautogui.screenshot('screenshot_by_rayen2020.png') speak('The screenshot is saved as screenshot_by_rayen2020.png') elif 'click' in query and 'start' in query: pyautogui.moveTo(10,1200) pyautogui.click() elif ('open' in query or 'click' in query) and 'calendar' in query: pyautogui.moveTo(1800,1200) pyautogui.click() elif 'minimise' in query and 'screen' in query: pyautogui.moveTo(1770,0) pyautogui.click() elif 'increase' in query and ('volume' in query or 'sound' in query): pyautogui.press('volumeup') elif 'decrease' in query and ('volume' in query or 'sound' in query): pyautogui.press('volumedown') elif 'capslock' in query or ('caps' in query and 'lock' in query): pyautogui.press('capslock') elif 'mute' in query: pyautogui.press('volumemute') elif 'search' in query and ('bottom' in query or 'pc' in query or 'laptop' in query or 'app' in query): pyautogui.moveTo(250,1200) pyautogui.click() speak('What do you want to search?') query = takeCommand().lower() pyautogui.write(f'{query}') pyautogui.press('enter') elif ('check' in query or 'tell' in query or 'let me know' in query) and 'website' in query and (('up' in query or 'working' in query) or 'down' in query): speak('Paste the website in input to know it is up or down') check_website_status = input("Paste the website here: ") try: status = urllib.request.urlopen(f"{check_website_status}").getcode() if status == 200: print('Website is up, you can open it.') speak('Website is up, you can open it.') else: print('Website is down, or no any website is available of this name.') speak('Website is down, or no any website is available of this name.') except: speak('URL not found') elif ('go' in query or 'open' in query) and 'settings' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('settings') pyautogui.press('enter') elif 'close' in query and ('click' in query or 'window' in query): pyautogui.moveTo(1885,10) speak('Should I close this window?') query = takeCommand().lower() close_window() elif 'night light' in query and ('on' in query or 'off' in query or 'close' in query): pyautogui.moveTo(1880,1050) pyautogui.click() time.sleep(1) pyautogui.moveTo(1840,620) pyautogui.click() pyautogui.moveTo(1880,1050) pyautogui.click() elif 'notification' in query and ('show' in query or 'click' in query or 'open' in query or 'close' in query or 'on' in query or 'off' in query or 'icon' in query or 'pc' in query or 'laptop' in query): pyautogui.moveTo(1880,1050) pyautogui.click() elif ('increase' in query or 'decrease' in query or 'change' in query or 'minimize' in query or 'maximize' in query) and 'brightness' in query: speak('At what percent should I kept the brightness, 25, 50, 75 or 100?') brightness() elif '-' in query: speak('If you want to do any mathematical calculation then give me a command to open calculator.') elif 'open' in query: if 'gallery' in query or 'photo' in query or 'image' in query or 'pic' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('photo') pyautogui.press('enter') elif 'proteus' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('proteus') pyautogui.press('enter') elif 'word' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('word') pyautogui.press('enter') elif ('power' in query and 'point' in query) or 'presntation' in query or 'ppt' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('ppt') pyautogui.press('enter') elif 'file' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('file') pyautogui.press('enter') elif 'edge' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('microsoft edge') pyautogui.press('enter') elif 'wps' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('wps office') pyautogui.press('enter') elif 'spyder' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('spyder') pyautogui.press('enter') elif 'snip' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('snip') pyautogui.press('enter') elif 'pycharm' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('pycharm') pyautogui.press('enter') elif 'this pc' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('this pc') pyautogui.press('enter') elif 'scilab' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('sciab') pyautogui.press('enter') elif 'autocad' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('autocad') pyautogui.press('enter') elif 'obs' in query and 'studio' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('OBS Studio') pyautogui.press('enter') elif 'android' in query and 'studio' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('android studio') pyautogui.press('enter') elif ('vs' in query or 'visual studio' in query) and 'code' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('visual studio code') pyautogui.press('enter') elif 'code' in query and 'block' in query: pyautogui.moveTo(250,1200) pyautogui.click() time.sleep(1) pyautogui.write('codeblocks') pyautogui.press('enter') elif 'me the answer' in query: speak('Yes sir, I will try my best to answer you.') elif 'me answer' in query or ('answer' in query and 'question' in query): speak('Yes sir, I will try my best to answer you.') elif 'map' in query: webbrowser.open('https://www.google.com/maps') time.sleep(10) elif 'can you' in query or 'could you' in query: speak('I will try my best if I can do that.') elif 'do you' in query: speak('I will try my best if I can do that.') elif 'truth' in query: speak('I always speak truth. I never lie.') elif 'true' in query: speak('I always speak truth. I never lie.') elif 'lying' in query: speak('I always speak truth. I never lie.') elif 'liar' in query: speak('I always speak truth. I never lie.') elif 'doubt' in query: speak('I will try my best if I can clear your doubt.') elif ' by' in query: speak('If you want to do any mathematical calculation then give me a command to open calculator.') elif 'hii' in query: speak('hii sir') elif 'hey' in query: speak('hello sir') elif 'hai' in query: speak('hello sir') elif 'hay' in query: speak('hello sir') elif 'hi' in query: speak('hii Sir') elif 'hello' in query: speak('hello Sir!') elif 'kon' in query and 'aahe' in query: speak('Me eka robot aahee sir. Maazee naav akshu2020 aahee.') elif 'nonsense' in query: speak("I'm sorry sir") elif 'mad' in query: speak("I'm sorry sir") elif 'shut up' in query: speak("I'm sorry sir") elif 'nice' in query: speak('Thank you sir') elif 'good' in query or 'wonderful' in query or 'great' in query: speak('Thank you sir') elif 'excellent' in query: speak('Thank you sir') elif 'ok' in query: speak('Hmmmmmm') elif 'akshu 2020' in query: speak('yes sir') elif len(query) >= 200: speak('Your voice is pretty good!') elif ' ' in query: try: #query = query.replace("what is ","") results = wikipedia.summary(query, sentences=3) print(results) speak(results) except Exception as e: speak('I unable to answer your question.') elif 'a' in query or 'b' in query or 'c' in query or 'd' in query or 'e' in query or 'f' in query or 'g' in query or 'h' in query or 'i' in query or 'j' in query or 'k' in query or 'l' in query or 'm' in query or 'n' in query or 'o' in query or 'p' in query or 'q' in query or 'r' in query or 's' in query or 't' in query or 'u' in query or 'v' in query or 'w' in query or 'x' in query or 'y' in query or 'z' in query: try: results = wikipedia.summary(query, sentences = 2) print(results) speak(results) except Exception as e: speak('I unable to answer your question. ') else: speak('I unable to give answer of your question')

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</div> <br> <div class="w3-example"> <h3>Example</h3> <p>A paragraph is marked up as follows:</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>p<span class="tagcolor" style="color:mediumblue">&gt;</span></span>This is some text in a paragraph.<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>/p<span class="tagcolor" style="color:mediumblue">&gt;</span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_paragraphs1" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <p>More "Try it Yourself" examples below.</p> <hr> <h2>Definition and Usage</h2> <p>The <code class="w3-codespan">&lt;p&gt;</code> tag defines a paragraph.</p> <p>Browsers automatically add a single blank line before and after each <code class="w3-codespan">&lt;p&gt;</code> element.</p> <p><strong>Tip:</strong> Use CSS to <a href="/html/html_css.asp">style paragraphs</a>.</p> <hr> <h2>Browser Support</h2> <table class="browserref notranslate"> <tbody><tr> <th style="width:20%;font-size:16px;text-align:left;">Element</th> <th style="width:16%;" class="bsChrome" title="Chrome"></th> <th style="width:16%;" class="bsEdge" title="Internet Explorer / Edge"></th> <th style="width:16%;" class="bsFirefox" title="Firefox"></th> <th style="width:16%;" class="bsSafari" title="Safari"></th> <th style="width:16%;" class="bsOpera" title="Opera"></th> </tr><tr> <td style="text-align:left;">&lt;p&gt;</td> <td>Yes</td> <td>Yes</td> <td>Yes</td> <td>Yes</td> <td>Yes</td> </tr> </tbody></table> <hr> <h2>Global Attributes</h2> <p>The <code class="w3-codespan">&lt;p&gt;</code> tag also supports the <a href="ref_standardattributes.asp">Global Attributes in HTML</a>.</p> <hr> <h2>Event Attributes</h2> <p>The <code class="w3-codespan">&lt;p&gt;</code> tag also supports the <a href="ref_eventattributes.asp">Event Attributes in HTML</a>.</p> <hr> <div id="midcontentadcontainer" style="overflow:auto;text-align:center"> <!-- MidContent --> <!-- <p class="adtext">Advertisement</p> --> <div id="adngin-mid_content-0" data-google-query-id="CKfs_8ueqvcCFXiOSwUd2fYBLg"><div id="sn_ad_label_adngin-mid_content-0" class="sn_ad_label" style="color:#000000;font-size:12px;margin:0;text-align:center;">ADVERTISEMENT</div><div id="google_ads_iframe_/22152718,16833175/sws-hb//w3schools.com//mid_content_1__container__" style="border: 0pt none; display: inline-block; width: 300px; height: 250px;"><iframe frameborder="0" src="https://56d0da6c34aaa471db22bb4266aac656.safeframe.googlesyndication.com/safeframe/1-0-38/html/container.html" id="google_ads_iframe_/22152718,16833175/sws-hb//w3schools.com//mid_content_1" title="3rd party ad content" name="" scrolling="no" marginwidth="0" marginheight="0" width="300" height="250" data-is-safeframe="true" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" role="region" aria-label="Advertisement" tabindex="0" data-google-container-id="8" style="border: 0px; vertical-align: bottom;" data-load-complete="true"></iframe></div></div> </div> <hr> <h2>More Examples</h2> <div class="w3-example"> <h3>Example</h3> <p>Align text in a paragraph (with CSS):</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>p<span class="attributecolor" style="color:red"> style<span class="attributevaluecolor" style="color:mediumblue">="text-align:right"</span></span><span class="tagcolor" style="color:mediumblue">&gt;</span></span>This is some text in a paragraph.<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>/p<span class="tagcolor" style="color:mediumblue">&gt;</span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_p_align_css" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <div class="w3-example"> <h3>Example</h3> <p>Style paragraphs with CSS:</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>html<span class="tagcolor" style="color:mediumblue">&gt;</span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>head<span class="tagcolor" style="color:mediumblue">&gt;</span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>style<span class="tagcolor" style="color:mediumblue">&gt;</span></span><span class="cssselectorcolor" style="color:brown"><br>p <span class="cssdelimitercolor" style="color:black">{</span><span class="csspropertycolor" style="color:red"><br>&nbsp; color<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> navy<span class="cssdelimitercolor" style="color:black">;</span></span><br>&nbsp; text-indent<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 30px<span class="cssdelimitercolor" style="color:black">;</span></span><br>&nbsp; text-transform<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> uppercase<span class="cssdelimitercolor" style="color:black">;</span></span><br></span><span class="cssdelimitercolor" style="color:black">}</span><br></span><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>/style<span class="tagcolor" style="color:mediumblue">&gt;</span></span><br> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>/head<span class="tagcolor" style="color:mediumblue">&gt;</span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>body<span class="tagcolor" style="color:mediumblue">&gt;</span></span><br><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>p<span class="tagcolor" style="color:mediumblue">&gt;</span></span>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>/p<span class="tagcolor" style="color:mediumblue">&gt;</span></span><br><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>/body<span class="tagcolor" style="color:mediumblue">&gt;</span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>/html<span class="tagcolor" style="color:mediumblue">&gt;</span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_p_style_css" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <div class="w3-example"> <h3>Example</h3> <p>&nbsp;More on paragraphs:</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>p<span class="tagcolor" style="color:mediumblue">&gt;</span></span><br>This paragraph<br>contains a lot of lines<br>in the source code,<br> but the browser <br>ignores it.<br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>/p<span class="tagcolor" style="color:mediumblue">&gt;</span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_paragraphs2" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <div class="w3-example"> <h3>Example</h3> <p>Poem problems in HTML:</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>p<span class="tagcolor" style="color:mediumblue">&gt;</span></span><br>My Bonnie lies over the ocean.<br>My Bonnie lies over the sea.<br>My Bonnie lies over the ocean.<br>Oh, bring back my Bonnie to me.<br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue">&lt;</span>/p<span class="tagcolor" style="color:mediumblue">&gt;</span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_poem" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <hr> <h2>Related Pages</h2> <p>HTML tutorial: <a href="/html/html_paragraphs.asp">HTML Paragraphs</a></p> <p>HTML DOM reference: <a href="/jsref/dom_obj_paragraph.asp">Paragraph Object</a></p> <hr> <h2>Default CSS Settings</h2> <p>Most browsers will display the <code class="w3-codespan">&lt;p&gt;</code> element with the following default values:</p> <div class="w3-example"> <h3>Example</h3> <div class="w3-code notranslate cssHigh"><span class="cssselectorcolor" style="color:brown"> p <span class="cssdelimitercolor" style="color:black">{</span><span class="csspropertycolor" style="color:red"><br>&nbsp; display<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> block<span class="cssdelimitercolor" style="color:black">;</span></span><br>&nbsp; margin-top<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 1em<span class="cssdelimitercolor" style="color:black">;</span></span><br>&nbsp; margin-bottom<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 1em<span class="cssdelimitercolor" style="color:black">;</span></span><br>&nbsp; margin-left<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 0<span class="cssdelimitercolor" style="color:black">;</span></span><br>&nbsp;&nbsp;margin-right<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 0<span class="cssdelimitercolor" style="color:black">;</span></span><br></span><span class="cssdelimitercolor" style="color:black">}</span> 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PYTHON CODE WALKTHROUGH Data Sourcing In order to run a discounted cash flow model (DCF), I needed data, so I found a free API that provided us with everything I needed. I wrote a code that saved every financial statement of every company in a separate text file. In this code, I asked to ping the API’s URL for every ticker, open a text file for one of the financial statements for one company ticker, dump all the data found by the code into this file, and close it. This process was repeated for every company in our company list and every statement I have a code for. By doing so I Ire able to store the data for every company locally and did not need to ping the API every time I ran our code. Once all the financial data for each company was stored in form of a balance sheet, income statement, cash flow statement, and company profile text file, I needed to pick out specific items required for our DCF model. Thus, I defined the functions that selected all required items from the respective financial statements of each company and assigned them to a variable using utils.py. Discounted Cash Flow Model First of all, I needed to import the functions I defined in utils.py before defining the DCF model function, which would run for every company in our list. Next, I ensured to have 5 consecutive years of past data to compute the average. Thus, the first few lines of code checked whether the last year on record was 2019 from which point I would go back 5 years; if the last year was 2018, this would be taken as the first data entry from which I would go back 5 years. The second part mentioned above is important because companies file their 10-K, i.e. their annual report, at different times throughout the year so there may be companies that already filed their reports while others had not. After this step, five-year averages of every item’s percentage of revenue Ire calculated as Ill as the average revenue growth over the same period. These items included EBIT, depreciation & amortization, capital expenditures, and the change in net working capital. Once that was done, there Ire only three variables missing before calculating free cash flows for the next few years: a discount or hurdle rate; industry-specific perpetual growth rates; and a tax rate. After these three variables Ire set up, the next step was to calculate the free cash flows to the firm (fcff) for the next 5 years and determine the terminal value at the end of the period using the growth rate for the corresponding industry. For the former, I use a loop to calculate the fcff for all the year, discount it, and add it to one variable called fcffpv. Once the terminal value was calculated, these two additional numbers captured the enterprise value of the firm. Since I Ire interested in the equity value, I subtracted debt and add cash, which left us with the equity value. In one final step, I divided this value by the number of shares to end up with an intrinsic value per share. After calculating the intrinsic value per share, I compared it to the current share price with two additions. First, I added a buffer to minimize our downside risk for inaccuracy in calculations, which is called the margin of safety. Here, the intrinsic value should at least be 115% of the current share price. I also set an upper limit at 130% to ensure I would not include companies with extraordinarily high valuations, compared to their current price. If the share price calculated fell within this window, I added its ticker to a dataframe, which was the last step in the function. As such, the DCF function would run for every company and provide a dataframe with the tickers of all those companies that Ire undervalued at the time and fell within the 115% - 130% range. Portfolio Optimization The dataframe with the tickers of all the undervalued companies that was previously created has now become the portfolio, which I converted into a list and used as the source for further optimization that is about to come. Some general inputs for the rest of the code Ire the start and end date of the data I requested for optimization, as Ill as the risk-free rate and the number of simulations I wanted to run our optimizations for. Now that the general framework has been created, it is time to choose some conditioning variables to measure the performance of investment in one sector or across a combination of some/all sectors, respectively. Project Alpha uses the following conditioning variables to optimize its portfolios: • Sharpe Ratio: It measures the performance of an investment compared to the risk-free asset, i.e. the 10-year Treasury Bond, after adjusting for its risk factor or standard deviation. The Sharpe ratio would be given a higher Iight for investors who have a higher risk tolerance. In terms of code, I used the bt package to retrieve the data betIen the predetermined start and end date for the companies in our ticker list. This data was then used to find the portfolio with the highest Sharpe ratio. For that, random Iights Ire assigned to each company and the ratio was computed. After running the number of simulations previously determined, the Iights with the highest Sharpe ratio will be located using loc() and labeled ‘sharpe_portfolio’ which is a dataframe containing the excess return, the volatility, Sharpe ratio, as Ill as the Iights for every company. I also located the portfolio with the loIst volatility, put it in a dataframe called ‘min_volatility_port’ which has the same attributes. The rest of the code of this segment simply created a picture with all the portfolios generated, displaying the efficient frontier and highlighting the portfolio with the highest Sharpe ratio and loIst volatility. • Value at Risk (VaR): VaR was chosen as a diagnostic tool to assess the model. In our case, it basically indicated the percentage of time in which a loss greater than 1% would occur over a period of 5 years. Its limitation is that although it measures how bad the best of the bad is, it does not measure how bad it can get, meaning the worst of the worst. In regards to the code, I first requested the adjusted closing for the companies in our ticker list in the determined time horizon. I then retrieved the Iights from our Sharpe portfolio, set the number of days I wanted to simulate as Ill as the cutoff, before calculating the returns of every company in every period; here: daily. Thereafter, I created a new variable called ‘sigma’, which was be a copy of our return variable, in order to ensure the right format and type for our Monte Carlo loop. The simulation is pretty straight forward, as it measures how many runs the returns fall within 1% or outside of it. I then Iighed the resulting returns by the Iight of the company in the portfolio and whenever the portfolio return was outside the set boundary, it would count as a ‘bad simulation’. Once that is done, the number of bad simulations was divided by the total number of simulations to end up with a percentage of how many simulations were bad, which equals our VaR • Treynor Ratio: For the investors that already have a perfectly diversified portfolio and would like to add more assets to it, there would be a higher Iight on the Treynor ratio. It basically uses beta as a risk factor because it carries the risk relative to the market, instead of standard deviation as in Sharpe, meaning only systematic or non-diversifiable risk. For the code, I first calculated the portfolio’s beta. For that, I defined a function ‘beta’ that reads the beta of every company and returns it. The next step is to run a loop that would enter the beta of every company in our ticker list into a new dataframe. After setting the index equal to the tickers and transposing the Sharpe portfolio Iights, I can concat the two thus resulting in two columns: one is the beta of every company and the second is the corresponding Iight in the portfolio. I then created a third column as the product of columns one and two. The sum of all entries in that column is the portfolio beta, which was then used as the denominator for the ratio. The nominator was already calculated as ‘Excess Return’ in the Sharpe portfolio. • Sortino Ratio: The Sortino ratio measures only the downside risk (downside deviation or semi-deviation) by measuring returns against a minimum acceptable return, 𝜏. It is surprising to know that most of the industry ignores the total number of periods taken and just calculates the downside deviation by choosing the periods with downside risk, which results in misleading results. Project Alpha uses all the periods to calculate the same, so as to have an advantage over those robo-advisors/financial advisors that do not follow this process. The alpha in the future would be generated by going long on companies with high correct Sortino and low incorrect Sortino as they are undervalued, and shorting those with low correct Sortino and high incorrect Sortino as these are overvalued. The Sortino ratio would be given more Iight for investors who are more risk averse. This part of the code started with retrieving the data for our benchmark, the S&P 500, for the period and the calculating the average daily and annual return. After that, I calculate the portfolio returns, ‘returns[“Returns”]’, by adding the products of every company’s Iight times its return, which gave us the portfolio return for every period. From here, I calculated the downside risk by comparing the portfolio return in every period to the daily average return of our benchmark in a for loop. Before I did that, I defined a new variable called ‘semi’, which is a data series and will be filled with whatever comes out of the loop every single time. If the portfolio return minus the average daily return of the benchmark was greater than 0 – meaning the portfolio earned more than the average of the S&P500 – the value for the period was set to 0 and added to the semi data series. If it is 0, which is extremely unlikely, but whatever, it would also be 0. If it is less than 0, hoIver, which indicates underperformance, I would square the portfolio return, which already gives us the semi variance I need for our next step. From here, I can simply take the square root of the average of the ‘semi’ data series to get the daily downside risk and multiplying it by the square root of 252, which gives us the annual number. After that, I have all the numbers to calculate the Sortino ratio. • Information Ratio: The information ratio measures the portfolio returns compared to the returns of a benchmark index, i.e. S&P500, after adjusting for its additional risk. It only looks at the excess return of the portfolio over the benchmark and the volatility or risk associated with it. I already have all the inputs I need to calculate his ratio. Thus, I simply created a new dataframe with the portfolio returns of every period and the benchmark returns of every period. To find the excess return, i.e. the nominator, I simply subtracted the latter from the former and assigned it to a new variable, which I called ‘excess_return’. The nominator would be the average return of the portfolio minus the average return of the benchmark, and the denominator would be the standard deviation of the ‘excess_return’ series. Finally, I printed short sentences with the results for every conditioning variable just described as an output in the console.

Sublime Text package to make parenthesis, bracket, and square bracket completions smarter

Railsgirls Berlin Learning Group Project

Telegram messenger CLI Build Status Command-line interface for Telegram. Uses readline interface. API, Protocol documentation Documentation for Telegram API is available here: http://core.telegram.org/api Documentation for MTproto protocol is available here: http://core.telegram.org/mtproto Upgrading to version 1.0 First of all, the binary is now in ./bin folder and is named telegram-cli. So be careful, not to use old binary. Second, config folder is now ${HOME}/.telegram-cli Third, database is not compatible with older versions, so you'll have to login again. Fourth, in peer_name '#' are substitued to '@'. (Not applied to appending of '#%d' in case of two peers having same name). Installation Clone GitHub Repository git clone --recursive https://github.com/vysheng/tg.git && cd tg Python Support Python support is currently limited to Python 2.7 or Python 3.1+. Other versions may work but are not tested. Linux and BSDs Install libs: readline, openssl and (if you want to use config) libconfig, liblua, python and libjansson. If you do not want to use them pass options --disable-libconfig, --disable-liblua, --disable-python and --disable-json respectively. On Ubuntu/Debian use: sudo apt-get install libreadline-dev libconfig-dev libssl-dev lua5.2 liblua5.2-dev libevent-dev libjansson-dev libpython-dev make On gentoo: sudo emerge -av sys-libs/readline dev-libs/libconfig dev-libs/openssl dev-lang/lua dev-libs/libevent dev-libs/jansson dev-lang/python On Fedora: sudo dnf install lua-devel openssl-devel libconfig-devel readline-devel libevent-devel libjansson-devel python-devel On Archlinux: yaourt -S telegram-cli-git On FreeBSD: pkg install libconfig libexecinfo lua52 python On OpenBSD: pkg_add libconfig libexecinfo lua python On openSUSE: sudo zypper in lua-devel libconfig-devel readline-devel libevent-devel libjansson-devel python-devel libopenssl-devel Then, ./configure make Other methods to install on linux On Gentoo: use ebuild provided. On Arch: https://aur.archlinux.org/packages/telegram-cli-git Mac OS X The client depends on readline library and libconfig, which are not included in OS X by default. You have to install these libraries manually. If using Homebrew: brew install libconfig readline lua python libevent jansson export CFLAGS="-I/usr/local/include -I/usr/local/Cellar/readline/6.3.8/include" export LDFLAGS="-L/usr/local/lib -L/usr/local/Cellar/readline/6.3.8/lib" ./configure && make Thanks to @jfontan for this solution. If using MacPorts: sudo port install libconfig-hr sudo port install readline sudo port install lua51 sudo port install python34 sudo port install libevent export CFLAGS="-I/usr/local/include -I/opt/local/include -I/opt/local/include/lua-5.1" export LDFLAGS="-L/usr/local/lib -L/opt/local/lib -L/opt/local/lib/lua-5.1" ./configure && make Install these ports: devel/libconfig devel/libexecinfo lang/lua52 Then build: env CC=clang CFLAGS=-I/usr/local/include LDFLAGS=-L/usr/local/lib LUA=/usr/local/bin/lua52 LUA_INCLUDE=-I/usr/local/include/lua52 LUA_LIB=-llua-5.2 ./configure make Other UNIX If you manage to launch it on other UNIX, please let me know. Contacts If you would like to ask a question, you can write to my telegram or to the github (or both). To contact me via telegram, you should use import_card method with argument 000653bf:0738ca5d:5521fbac:29246815:a27d0cda Usage bin/telegram-cli -k <public-server-key> By default, the public key is stored in tg-server.pub in the same folder or in /etc/telegram-cli/server.pub. If not, specify where to find it: bin/telegram-cli -k tg-server.pub Client support TAB completion and command history. Peer refers to the name of the contact or dialog and can be accessed by TAB completion. For user contacts peer name is Name Lastname with all spaces changed to underscores. For chats it is it's title with all spaces changed to underscores For encrypted chats it is <Exсlamation mark> Name Lastname with all spaces changed to underscores. If two or more peers have same name, number is appended to the name. (for example A_B, A_B#1, A_B#2 and so on) Supported commands Messaging msg <peer> Text - sends message to this peer fwd <user> <msg-seqno> - forward message to user. You can see message numbers starting client with -N chat_with_peer <peer> starts one on one chat session with this peer. /exit or /quit to end this mode. add_contact <phone-number> <first-name> <last-name> - tries to add contact to contact-list by phone rename_contact <user> <first-name> <last-name> - tries to rename contact. If you have another device it will be a fight mark_read <peer> - mark read all received messages with peer delete_msg <msg-seqno> - deletes message (not completly, though) restore_msg <msg-seqno> - restores delete message. Impossible for secret chats. Only possible short time (one hour, I think) after deletion Multimedia send_photo <peer> <photo-file-name> - sends photo to peer send_video <peer> <video-file-name> - sends video to peer send_text <peer> <text-file-name> - sends text file as plain messages load_photo/load_video/load_video_thumb/load_audio/load_document/load_document_thumb <msg-seqno> - loads photo/video/audio/document to download dir view_photo/view_video/view_video_thumb/view_audio/view_document/view_document_thumb <msg-seqno> - loads photo/video to download dir and starts system default viewer fwd_media <msg-seqno> send media in your message. Use this to prevent sharing info about author of media (though, it is possible to determine user_id from media itself, it is not possible get access_hash of this user) set_profile_photo <photo-file-name> - sets userpic. Photo should be square, or server will cut biggest central square part Group chat options chat_info <chat> - prints info about chat chat_add_user <chat> <user> - add user to chat chat_del_user <chat> <user> - remove user from chat rename_chat <chat> <new-name> create_group_chat <chat topic> <user1> <user2> <user3> ... - creates a groupchat with users, use chat_add_user to add more users chat_set_photo <chat> <photo-file-name> - sets group chat photo. Same limits as for profile photos. Search search <peer> pattern - searches pattern in messages with peer global_search pattern - searches pattern in all messages Secret chat create_secret_chat <user> - creates secret chat with this user visualize_key <secret_chat> - prints visualization of encryption key. You should compare it to your partner's one set_ttl <secret_chat> <ttl> - sets ttl to secret chat. Though client does ignore it, client on other end can make use of it accept_secret_chat <secret_chat> - manually accept secret chat (only useful when starting with -E key) Stats and various info user_info <user> - prints info about user history <peer> [limit] - prints history (and marks it as read). Default limit = 40 dialog_list - prints info about your dialogs contact_list - prints info about users in your contact list suggested_contacts - print info about contacts, you have max common friends stats - just for debugging show_license - prints contents of GPLv2 help - prints this help get_self - get our user info Card export_card - print your 'card' that anyone can later use to import your contact import_card <card> - gets user by card. You can write messages to him after that. Other quit - quit safe_quit - wait for all queries to end then quit

In this assignment you will write smallsh your own shell in C. smallsh will implement a subset of features of well-known shells, such as bash. Your program will Provide a prompt for running commands Handle blank lines and comments, which are lines beginning with the # character Provide expansion for the variable $$ Execute 3 commands exit, cd, and status via code built into the shell Execute other commands by creating new processes using a function from the exec family of functions Support input and output redirection Support running commands in foreground and background processes Implement custom handlers for 2 signals, SIGINT and SIGTSTP Learning Outcomes After successful completion of this assignment, you should be able to do the following Describe the Unix process API (Module 4, MLO 2) Write programs using the Unix process API (Module 4, MLO 3) Explain the concept of signals and their uses (Module 5, MLO 2) Write programs using the Unix API for signal handling (Module 5, MLO 3) Explain I/O redirection and write programs that can employ I/O redirection (Module 5, MLO 4) Program Functionality 1. The Command Prompt Use the colon : symbol as a prompt for each command line. The general syntax of a command line is: command [arg1 arg2 ...] [< input_file] [> output_file] [&] …where items in square brackets are optional. You can assume that a command is made up of words separated by spaces. The special symbols <, > and & are recognized, but they must be surrounded by spaces like other words. If the command is to be executed in the background, the last word must be &. If the & character appears anywhere else, just treat it as normal text. If standard input or output is to be redirected, the > or < words followed by a filename word must appear after all the arguments. Input redirection can appear before or after output redirection. Your shell does not need to support any quoting; so arguments with spaces inside them are not possible. We are also not implementing the pipe "|" operator. Your shell must support command lines with a maximum length of 2048 characters, and a maximum of 512 arguments. You do not need to do any error checking on the syntax of the command line. 2. Comments & Blank Lines Your shell should allow blank lines and comments. Any line that begins with the # character is a comment line and should be ignored. Mid-line comments, such as the C-style //, will not be supported. A blank line (one without any commands) should also do nothing. Your shell should just re-prompt for another command when it receives either a blank line or a comment line. 3. Expansion of Variable $$ Your program must expand any instance of "$$" in a command into the process ID of the smallsh itself. Your shell does not otherwise perform variable expansion. 4. Built-in Commands Your shell will support three built-in commands: exit, cd, and status. These three built-in commands are the only ones that your shell will handle itself - all others are simply passed on to a member of the exec() family of functions. You do not have to support input/output redirection for these built in commands These commands do not have to set any exit status. If the user tries to run one of these built-in commands in the background with the & option, ignore that option and run the command in the foreground anyway (i.e. don't display an error, just run the command in the foreground). exit The exit command exits your shell. It takes no arguments. When this command is run, your shell must kill any other processes or jobs that your shell has started before it terminates itself. cd The cd command changes the working directory of smallsh. By itself - with no arguments - it changes to the directory specified in the HOME environment variable This is typically not the location where smallsh was executed from, unless your shell executable is located in the HOME directory, in which case these are the same. This command can also take one argument: the path of a directory to change to. Your cd command should support both absolute and relative paths. status The status command prints out either the exit status or the terminating signal of the last foreground process ran by your shell. If this command is run before any foreground command is run, then it should simply return the exit status 0. The three built-in shell commands do not count as foreground processes for the purposes of this built-in command - i.e., status should ignore built-in commands. 5. Executing Other Commands Your shell will execute any commands other than the 3 built-in command by using fork(), exec() and waitpid() Whenever a non-built in command is received, the parent (i.e., smallsh) will fork off a child. The child will use a function from the exec() family of functions to run the command. Your shell should use the PATH variable to look for non-built in commands, and it should allow shell scripts to be executed If a command fails because the shell could not find the command to run, then the shell will print an error message and set the exit status to 1 A child process must terminate after running a command (whether the command is successful or it fails). 6. Input & Output Redirection You must do any input and/or output redirection using dup2(). The redirection must be done before using exec() to run the command. An input file redirected via stdin should be opened for reading only; if your shell cannot open the file for reading, it should print an error message and set the exit status to 1 (but don't exit the shell). Similarly, an output file redirected via stdout should be opened for writing only; it should be truncated if it already exists or created if it does not exist. If your shell cannot open the output file it should print an error message and set the exit status to 1 (but don't exit the shell). Both stdin and stdout for a command can be redirected at the same time (see example below). 7. Executing Commands in Foreground & Background Foreground Commands Any command without an & at the end must be run as a foreground command and the shell must wait for the completion of the command before prompting for the next command. For such commands, the parent shell does NOT return command line access and control to the user until the child terminates. Background Commands Any non built-in command with an & at the end must be run as a background command and the shell must not wait for such a command to complete. For such commands, the parent must return command line access and control to the user immediately after forking off the child. The shell will print the process id of a background process when it begins. When a background process terminates, a message showing the process id and exit status will be printed. This message must be printed just before the prompt for a new command is displayed. If the user doesn't redirect the standard input for a background command, then standard input should be redirected to /dev/null If the user doesn't redirect the standard output for a background command, then standard output should be redirected to /dev/null 8. Signals SIGINT & SIGTSTP SIGINT A CTRL-C command from the keyboard sends a SIGINT signal to the parent process and all children at the same time (this is a built-in part of Linux). Your shell, i.e., the parent process, must ignore SIGINT Any children running as background processes must ignore SIGINT A child running as a foreground process must terminate itself when it receives SIGINT The parent must not attempt to terminate the foreground child process; instead the foreground child (if any) must terminate itself on receipt of this signal. If a child foreground process is killed by a signal, the parent must immediately print out the number of the signal that killed it's foreground child process (see the example) before prompting the user for the next command. SIGTSTP A CTRL-Z command from the keyboard sends a SIGTSTP signal to your parent shell process and all children at the same time (this is a built-in part of Linux). A child, if any, running as a foreground process must ignore SIGTSTP. Any children running as background process must ignore SIGTSTP. When the parent process running the shell receives SIGTSTP The shell must display an informative message (see below) immediately if it's sitting at the prompt, or immediately after any currently running foreground process has terminated The shell then enters a state where subsequent commands can no longer be run in the background. In this state, the & operator should simply be ignored, i.e., all such commands are run as if they were foreground processes. If the user sends SIGTSTP again, then your shell will Display another informative message (see below) immediately after any currently running foreground process terminates The shell then returns back to the normal condition where the & operator is once again honored for subsequent commands, allowing them to be executed in the background. See the example below for usage and the exact syntax which you must use for these two informative messages. Sample Program Execution Here is an example run using smallsh. Note that CTRL-C has no effect towards the bottom of the example, when it's used while sitting at the command prompt: $ smallsh : ls junk smallsh smallsh.c : ls > junk : status exit value 0 : cat junk junk smallsh smallsh.c : wc < junk > junk2 : wc < junk 3 3 23 : test -f badfile : status exit value 1 : wc < badfile cannot open badfile for input : status exit value 1 : badfile badfile: no such file or directory : sleep 5 ^Cterminated by signal 2 : status & terminated by signal 2 : sleep 15 & background pid is 4923 : ps PID TTY TIME CMD 4923 pts/0 00:00:00 sleep 4564 pts/0 00:00:03 bash 4867 pts/0 00:01:32 smallsh 4927 pts/0 00:00:00 ps : : # that was a blank command line, this is a comment line : background pid 4923 is done: exit value 0 : # the background sleep finally finished : sleep 30 & background pid is 4941 : kill -15 4941 background pid 4941 is done: terminated by signal 15 : pwd /nfs/stak/users/chaudhrn/CS344/prog3 : cd : pwd /nfs/stak/users/chaudhrn : cd CS344 : pwd /nfs/stak/users/chaudhrn/CS344 : echo 4867 4867 : echo $$ 4867 : ^C^Z Entering foreground-only mode (& is now ignored) : date Mon Jan 2 11:24:33 PST 2017 : sleep 5 & : date Mon Jan 2 11:24:38 PST 2017 : ^Z Exiting foreground-only mode : date Mon Jan 2 11:24:39 PST 2017 : sleep 5 & background pid is 4963 : date Mon Jan 2 11:24:39 PST 2017 : exit $ Hints & Resources 1. The Command Prompt Be sure you flush out the output buffers each time you print, as the text that you're outputting may not reach the screen until you do in this kind of interactive program. To do this, call fflush() immediately after each and every time you output text. Consider defining a struct in which you can store all the different elements included in a command. Then as you parse a command, you can set the value of members of a variable of this struct type. 2. Comments & Blank Lines This should be simple. 3. Expansion of Variable $$ Here are examples to illustrate the required behavior. Suppose the process ID of smallsh is 179. Then The string foo$$$$ in the command is converted to foo179179 The string foo$$$ in the command is converted to foo179$ 4. Built-in Commands It is recommended that you program the built-in commands first, before tackling the commands that require fork(), exec() and waitpid(). The built-in commands don't set the value of status. This means that however you are keeping track of the status, don't change it after the execution of a built-in command. A process can use chdir() (Links to an external site.) to change its directory. To test the implementation of the cd command in smallsh, don't use getenv("PWD") because it will not give you the correct result. Instead, you can use the function getcwd() (Links to an external site.). Here is why getenv("PWD") doesn't give you the correct result: PWD is an environment variable. As discussed in Module 4, Exploration: Environment "When a parent process forks a child process, the child process inherits the environment of its parent process." When you run smallsh from a bash shell, smallsh inherits the environment of this bash shell The value of PWD in the bash shell is set to the directory in which you are when you run the command to start smallsh smallsh inherits this value of PWD. When you change the directory in smallsh, it doesn't update the value of the environment variable PWD 5. Executing Other Commands Note that if exec() is told to execute something that it cannot do, like run a program that doesn't exist, it will fail, and return the reason why. In this case, your shell should indicate to the user that a command could not be executed (which you know because exec() returned an error), and set the value retrieved by the built-in status command to 1. Make sure that the child process that has had an exec() call fail terminates itself, or else it often loops back up to the top and tries to become a parent shell. This is easy to spot: if the output of the grading script seems to be repeating itself, then you've likely got a child process that didn't terminate after a failed exec(). You can choose any function in the exec() family. However, we suggest that using either execlp() or execvp() will be simplest because of the following reasons smallsh doesn't need to pass a new environment to the program. So the additional functionality provided by the exec() functions with names ending in e is not required. One example of a command that smallsh needs to run is ls (the graders will try this command at the start of the testing). Running this command will be a lot easier using the exec() functions that search the PATH environment variable. 6. Input & Output Redirection We recommend that the needed input/output redirection should be done in the child process. Note that after using dup2() to set up the redirection, the redirection symbol and redirection destination/source are NOT passed into the exec command For example, if the command given is ls > junk, then you handle the redirection to "junk" with dup2() and then simply pass ls into exec(). 7. Executing Commands in Foreground & Background Foreground Commands For a foreground command, it is recommend to have the parent simply call waitpid() on the child, while it waits. Background Commands The shell should respect the input and output redirection operators for a command regardless of whether the command is to be run in the foreground or the background. This means that a background command should use /dev/null for input only when input redirection is not specified in the command. Similarly a background command should use /dev/null for output only when output redirection is not specified in the command. Your parent shell will need to periodically check for the background child processes to complete, so that they can be cleaned up, as the shell continues to run and process commands. Consider storing the PIDs of non-completed background processes in an array. Then every time BEFORE returning access to the command line to the user, you can check the status of these processes using waitpid(...NOHANG...). Alternatively, you may use a signal handler to immediately wait() for child processes that terminate, as opposed to periodically checking a list of started background processes The time to print out when these background processes have completed is just BEFORE command line access and control are returned to the user, every time that happens. 8. Signals SIGINT & SIGTSTP Reentrancy is important when we consider that signal handlers cause jumps in execution that cause problems with certain functions. Note that the printf() family of functions is NOT reentrant. In your signal handlers, when outputting text, you must use other output functions! What to turn in? You can only use C for coding this assignment and you must use the gcc compiler. You can use C99 or GNU99 standard or the default standard used by the gcc installation on os1. Your assignment will be graded on os1. Submit a single zip file with all your code, which can be in as many different files as you want. This zip file must be named youronid_program3.zip where youronid should be replaced by your own ONID. E.g., if chaudhrn was submitting the assignment, the file must be named chaudhrn_program3.zip. In the zip file, you must include a text file called README.txt that contains instructions on how to compile your code using gcc to create an executable file that must be named smallsh. Your zip file should not contain any extraneous files. In particular, make sure not to zip up the __MACOSX directories. When you resubmit a file in Canvas, Canvas can attach a suffix to the file, e.g., the file name may become chaudhrn_program3-1.zip. Don't worry about this name change as no points will be deducted because of this. Caution During the development of this program, take extra care to only do your work on os1, our class server, as your software will likely negatively impact whatever machine it runs on, especially before it is finished. If you cause trouble on one of the non-class, public servers, it could hurt your grade! If you are having trouble logging in to any of our EECS servers because of runaway processes, please use this page to kill off any programs running on your account that might be blocking your access: T.E.A.C.H. - The Engineering Accounts and Classes HomepageLinks to an external site. Grading Criteria This assignment is worth 20% of your grade and there are 180 points available for it. 170 points are available in the test script, while the final 10 points will be based on your style, readability, and commenting. Comment well, often, and verbosely: we want to see that you are telling us WHY you are doing things, in addition to telling us WHAT you are doing. Once the program is compiled, according to your specifications given in README.txt, your shell will be executed to run a few sample commands against (ls, status, exit, in that order). If the program does not successfully work on those commands, it will receive a zero. If it works, then the grading script will be run against it (as detailed below) for final grading. Points will be assigned according to the grading script running on our class server only. Grading Method Here is the grading script p3testscript. It is a bash script that starts the smallsh program and runs commands on smallsh's command line. Most of the commands run by the grading script are very similar to the commands shown in the section Sample Program Execution. You can open the script in a text editor. The comments in the script will show you the points for individual items. Use the script to prepare for your grade, as this is how it's being earned. To run the script, place it in the same directory as your compiled shell, chmod it (chmod +x ./p3testscript) and run this command from a bash prompt: $ ./p3testscript 2>&1 or $ ./p3testscript 2>&1 | more or $ ./p3testscript > mytestresults 2>&1 Do not worry if the spacing, indentation, or look of the output of the script is different than when you run it interactively: that won’t affect your grade. The script may add extra colons at the beginning of lines or do other weird things, like put output about terminating processes further down the script than you intended. If your program does not work with the grading script, and you instead request that we grade your script by hand, we will apply a 15% reduction to your final score. So from the very beginning, make sure that you work with the grading script on our class server!

In-Browser PDF annotation using Canvas image editing tool. User can open PDF file in browser itself and annotate it. Annotation is based on Canvas image tool. PDF will be converted into Canvas image and user can used different tools to annotate PDF. Below list of tools have been implemented to annotate PDF. ## Tools Implemented: 1. Free Hand drawing 2. Square drawing 3. Circle drawing 4. Line drawing 5. Arrow drawing 6. Image attachment 7. Text writing 8. Undo/Redo functionality 9. Save PDF to local ## Future Enhancement Object movement

A simple PHP project displaying numbers 1 to 50 in red square divs with "hello world" text, using blue text for even numbers and yellow for odd, built with HTML, CSS, and PHP loops.

What is Java? Java is a popular programming language, created in 1995. It is owned by Oracle, and more than 3 billion devices run Java. It is used for: Mobile applications (specially Android apps) Desktop applications Web applications Web servers and application servers Games Database connection And much, much more! Why Use Java? Java works on different platforms (Windows, Mac, Linux, Raspberry Pi, etc.) It is one of the most popular programming language in the world It is easy to learn and simple to use It is open-source and free It is secure, fast and powerful It has a huge community support (tens of millions of developers) Java is an object oriented language which gives a clear structure to programs and allows code to be reused, lowering development costs As Java is close to C++ and C#, it makes it easy for programmers to switch to Java or vice versa Setup for Windows To install Java on Windows: Go to "System Properties" (Can be found on Control Panel > System and Security > System > Advanced System Settings) Click on the "Environment variables" button under the "Advanced" tab Then, select the "Path" variable in System variables and click on the "Edit" button Click on the "New" button and add the path where Java is installed, followed by \bin. By default, Java is installed in C:\Program Files\Java\jdk-11.0.1 (If nothing else was specified when you installed it). In that case, You will have to add a new path with: C:\Program Files\Java\jdk-11.0.1\bin Then, click "OK", and save the settings At last, open Command Prompt (cmd.exe) and type java -version to see if Java is running on your machine Keyword Description abstract A non-access modifier. Used for classes and methods: An abstract class cannot be used to create objects (to access it, it must be inherited from another class). An abstract method can only be used in an abstract class, and it does not have a body. The body is provided by the subclass (inherited from) assert For debugging boolean A data type that can only store true and false values break Breaks out of a loop or a switch block byte A data type that can store whole numbers from -128 and 127 case Marks a block of code in switch statements catch Catches exceptions generated by try statements char A data type that is used to store a single character class Defines a class continue Continues to the next iteration of a loop const Defines a constant. Not in use - use final instead default Specifies the default block of code in a switch statement do Used together with while to create a do-while loop double A data type that can store whole numbers from 1.7e−308 to 1.7e+308 else Used in conditional statements enum Declares an enumerated (unchangeable) type exports Exports a package with a module. New in Java 9 extends Extends a class (indicates that a class is inherited from another class) final A non-access modifier used for classes, attributes and methods, which makes them non-changeable (impossible to inherit or override) finally Used with exceptions, a block of code that will be executed no matter if there is an exception or not float A data type that can store whole numbers from 3.4e−038 to 3.4e+038 for Create a for loop goto Not in use, and has no function if Makes a conditional statement implements Implements an interface import Used to import a package, class or interface instanceof Checks whether an object is an instance of a specific class or an interface int A data type that can store whole numbers from -2147483648 to 2147483647 interface Used to declare a special type of class that only contains abstract methods long A data type that can store whole numbers from -9223372036854775808 to 9223372036854775808 module Declares a module. New in Java 9 native Specifies that a method is not implemented in the same Java source file (but in another language) new Creates new objects package Declares a package private An access modifier used for attributes, methods and constructors, making them only accessible within the declared class protected An access modifier used for attributes, methods and constructors, making them accessible in the same package and subclasses public An access modifier used for classes, attributes, methods and constructors, making them accessible by any other class requires Specifies required libraries inside a module. New in Java 9 return Finished the execution of a method, and can be used to return a value from a method short A data type that can store whole numbers from -32768 to 32767 static A non-access modifier used for methods and attributes. Static methods/attributes can be accessed without creating an object of a class strictfp Restrict the precision and rounding of floating point calculations super Refers to superclass (parent) objects switch Selects one of many code blocks to be executed synchronized A non-access modifier, which specifies that methods can only be accessed by one thread at a time this Refers to the current object in a method or constructor throw Creates a custom error throws Indicates what exceptions may be thrown by a method transient A non-accesss modifier, which specifies that an attribute is not part of an object's persistent state try Creates a try...catch statement var Declares a variable. New in Java 10 void Specifies that a method should not have a return value volatile Indicates that an attribute is not cached thread-locally, and is always read from the "main memory" while Creates a while loop Method Description Return Type charAt() Returns the character at the specified index (position) char codePointAt() Returns the Unicode of the character at the specified index int codePointBefore() Returns the Unicode of the character before the specified index int codePointCount() Returns the Unicode in the specified text range of this String int compareTo() Compares two strings lexicographically int compareToIgnoreCase() Compares two strings lexicographically, ignoring case differences int concat() Appends a string to the end of another string String contains() Checks whether a string contains a sequence of characters boolean contentEquals() Checks whether a string contains the exact same sequence of characters of the specified CharSequence or StringBuffer boolean copyValueOf() Returns a String that represents the characters of the character array String endsWith() Checks whether a string ends with the specified character(s) boolean equals() Compares two strings. Returns true if the strings are equal, and false if not boolean equalsIgnoreCase() Compares two strings, ignoring case considerations boolean format() Returns a formatted string using the specified locale, format string, and arguments String getBytes() Encodes this String into a sequence of bytes using the named charset, storing the result into a new byte array byte[] getChars() Copies characters from a string to an array of chars void hashCode() Returns the hash code of a string int indexOf() Returns the position of the first found occurrence of specified characters in a string int intern() Returns the index within this string of the first occurrence of the specified character, starting the search at the specified index String isEmpty() Checks whether a string is empty or not boolean lastIndexOf() Returns the position of the last found occurrence of specified characters in a string int length() Returns the length of a specified string int matches() Searches a string for a match against a regular expression, and returns the matches boolean offsetByCodePoints() Returns the index within this String that is offset from the given index by codePointOffset code points int regionMatches() Tests if two string regions are equal boolean replace() Searches a string for a specified value, and returns a new string where the specified values are replaced String replaceFirst() Replaces the first occurrence of a substring that matches the given regular expression with the given replacement String replaceAll() Replaces each substring of this string that matches the given regular expression with the given replacement String split() Splits a string into an array of substrings String[] startsWith() Checks whether a string starts with specified characters boolean subSequence() Returns a new character sequence that is a subsequence of this sequence CharSequence substring() Extracts the characters from a string, beginning at a specified start position, and through the specified number of character String toCharArray() Converts this string to a new character array char[] toLowerCase() Converts a string to lower case letters String toString() Returns the value of a String object String toUpperCase() Converts a string to upper case letters String trim() Removes whitespace from both ends of a string String valueOf() Returns the primitive value of a String object String Method Description Return Type abs(x) Returns the absolute value of x double|float|int|long acos(x) Returns the arccosine of x, in radians double asin(x) Returns the arcsine of x, in radians double atan(x) Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians double atan2(y,x) Returns the angle theta from the conversion of rectangular coordinates (x, y) to polar coordinates (r, theta). double cbrt(x) Returns the cube root of x double ceil(x) Returns the value of x rounded up to its nearest integer double copySign(x, y) Returns the first floating point x with the sign of the second floating point y double cos(x) Returns the cosine of x (x is in radians) double cosh(x) Returns the hyperbolic cosine of a double value double exp(x) Returns the value of Ex double expm1(x) Returns ex -1 double floor(x) Returns the value of x rounded down to its nearest integer double getExponent(x) Returns the unbiased exponent used in x int hypot(x, y) Returns sqrt(x2 +y2) without intermediate overflow or underflow double IEEEremainder(x, y) Computes the remainder operation on x and y as prescribed by the IEEE 754 standard double log(x) Returns the natural logarithm (base E) of x double log10(x) Returns the base 10 logarithm of x double log1p(x) Returns the natural logarithm (base E) of the sum of x and 1 double max(x, y) Returns the number with the highest value double|float|int|long min(x, y) Returns the number with the lowest value double|float|int|long nextAfter(x, y) Returns the floating point number adjacent to x in the direction of y double|float nextUp(x) Returns the floating point value adjacent to x in the direction of positive infinity double|float pow(x, y) Returns the value of x to the power of y double random() Returns a random number between 0 and 1 double round(x) Returns the value of x rounded to its nearest integer int rint() Returns the double value that is closest to x and equal to a mathematical integer double signum(x) Returns the sign of x double sin(x) Returns the sine of x (x is in radians) double sinh(x) Returns the hyperbolic sine of a double value double sqrt(x) Returns the square root of x double tan(x) Returns the tangent of an angle double tanh(x) Returns the hyperbolic tangent of a double value double toDegrees(x) Converts an angle measured in radians to an approx. equivalent angle measured in degrees double toRadians(x) Converts an angle measured in degrees to an approx. angle measured in radians double ulp(x) Returns the size of the unit of least precision (ulp) of x double|float

Preprocessing methods to enhance Tesseract-OCR in the case of printed text on difficult background, or handwritten text on lined/squared paper.

Today, in this new era of internet, Information Security is becoming a biggest challenge for the world due to the rapid growth of internet users day by day. Unauthorized access to secret data can have serious repercussions like financial loss etc. One of the best techniques for secure communication is Steganography-or covert writing. It is an art of hiding the very existence of communicated message itself. In this report, we present a hiding technique which can encrypt and decrypt message using cryptography and image steganography technique. The main objective of this project is to encrypt text message into image without much affecting the pixel values of original image. Every image is made up of three basic colors i.e, Red, Green and Blue. We can hide our text message into these colors. Performance of proposed steganography technique has been evaluated by calculating values of MSE (Mean square error), PSNR(Peak signal to noise ratio) and SNR(Signal to noise ratio).

Set playback speed for Read Aloud on ChatGPT.com. Clicking the speed display opens a popup to save the default playback speed and toggle the square design. Also adds color-coded icons for copy, thumbs up, thumbs down, read aloud, and stop buttons. Highlight color for strong text is green in dark mode and violet in light mode.

Encryption is a process for the protection of data by means of an encryption associated with a key so that the information is not visible, this with the aim of protecting the information of third parties that are not authorized to visualize, for this a symmetric algorithm is used of encryption called Hill Cipher (HC). The HC algorithm was perfectly adapted to the solution of the problem that already uses with a square matrix to encrypt the channels of the pixel of an image or the characters of a text. This is applied to an instant messaging application, thus preventing third parties from understanding the message.

The task in this programming assignment is to implement, a knowledge base and an inference engine for the wumpus world. First of all, you have to create a knowledge base (stored as a text file) storing the rules of the wumpus world, i.e., what we know about pits, monsters, breeze, and stench. Second, you have to create an inference engine, that given a knowledge base and a statement determines if, based on the knowledge base, the statement is definitely true, definitely false, or of unknown truth value. Command-line Arguments The program should be invoked from the commandline as follows: check_true_false wumpus_rules.txt [additional_knowledge_file] [statement_file] For example: check_true_false wumpus_rules.txt kb1.txt statement1.txt Argument wumpus_rules.txt specifies the location of a text file containing the wumpus rules, i.e., the rules that are true in any possible wumpus world, as specified above (once again, note that the specifications above are not identical to the ones in the book). Argument [additional_knowledge_file] specifies an input file that contains additional information, presumably collected by the agent as it moves from square to square. For example, see kb3.txt. Argument [statement_file] specifies an input file that contains a single logical statement. The program should check if, given the information in wumpus_rules.txt and [additional_knowledge_file], the statement in [statement_file] is definitely true, definitely false, or none of the above. Output Your program should create a text file called "result.txt". Depending on what your inference algorithm determined about the statement being true or false, the output file should contain one of the following four outputs: definitely true. This should be the output if the knowledge base entails the statement, and the knowledge base does not entail the negation of the statement. definitely false. This should be the output if the knowledge base entails the negation of the statement, and the knowledge base does not entail the statement. possibly true, possibly false. This should be the output if the knowledge base entails neither the statement nor the negation of the statement. both true and false. This should be the output if the knowledge base entails both the statement and the the negation of the statement. This happens when the knowledge base is always false (i.e., when the knowledge base is false for every single row of the truth table). Note that by "knowledge base" we are referring to the conjunction of all statements contained in wumpus_rules.txt AND in the additional knowledge file. Also note that the sample code provided below stores the words "result unknown" to the result.txt file. Also, the "both true and false" output should be given when the knowledge base (i.e., the info stored in wumpus_rules.txt AND in the additional knowledge file) entails both the statement from statement_file AND the negation of that statement. Syntax The wumpus rules file and the additional knowledge file contain multiple lines. Each line contains a logical statement. The knowledge base constructed by the program should be a conjunction of all the statements contained in the two files. The sample code (as described later) already does that. The statement file contains a single line, with a single logical statement. Statements are given in prefix notation. Some examples of prefix notation are: (or M_1_1 B_1_2) (and M_1_2 S_1_1 (not (or M_1_3 M_1_4))) (if M_1_1 (and S_1_2 S_1_3)) (iff M_1_2 (and S_1_1 S_1_3 S_2_2)) (xor B_2_2 P_1_2) P_1_1 B_3_4 (not P_1_1) Statements can be nested, as shown in the above examples. Note that: Any open parenthesis that is not the first character of a text line must be preceded by white space. Any open parenthesis must be immediately followed by a connective (without any white space in between). Any close parenthesis that is not the last character of a text line must be followed by white space. If the logical expression contains just a symbol (and no connectives), the symbol should NOT be enclosed in parentheses. For example, (P_1_1) is not legal, whereas (not P_1_1) is legal. See also the example statements given above. Each logical expression should be contained in a single line. The wumpus rules file and the additional knowledge file contain a set of logical expressions. The statement file should contain a single logical expression. If it contains more than one logical expression, only the first one is read. Lines starting with # are treated as comment lines, and ignored. You can have empty lines, but they must be totally empty. If a line has a single space on it (and nothing more) the program will complain and not read the file successfully. There are six connectives: and, or, xor, not, if, iff. No other connectives are allowed to be used in the input files. Here is some additional information: A statement can consist of either a single symbol, or a connective connecting multiple (sub)statements. Notice that this is a recursive definition. In other words, statements are symbols or more complicated statements that we can make by connecting simpler statements with one of the six connectives. Connectives "and", "or", and "xor" can connect any number of statements, including 0 statements. It is legal for a statement consisting of an "and", "or", or "xor" connective to have no substatements, e.g., (and). An "and" statement with zero substatements is true. An "or" or "xor" statement with zero substatements is false. An "xor" statement is true if exactly 1 substatement is true (no more, no fewer). Connectives "if" and "iff" require exactly two substatements. Connective "not" requires exactly one substatement. The only symbols that are allowed to be used are: M_i_j (standing for "there is a monster at square (i, j)). S_i_j (standing for "there is a stench at square (i, j)). P_i_j (standing for "there is a pit at square (i, j)). B_i_j (standing for "there is a breeze at square (i, j)). NO OTHER SYMBOLS ARE ALLOWED. Also, note that i and j can take values 1, 2, 3, and 4. In other words, there will be 16 unique symbols of the form M_i_j, 16 unique symbols of the form S_i_j, 16 unique symbols of the form P_i_j, and 16 unique symbols of the form B_i_j, for a total of 64 unique symbols. The Wumpus Rules Here is what we know to be true in any wumpus world, for the purposes of this assignment (NOTE THAT THESE RULES ARE NOT IDENTICAL TO THE ONES IN THE TEXTBOOK): If there is a monster at square (i,j), there is stench at all adjacent squares. If there is stench at square (i,j), there is a monster at one of the adjacent squares. If there is a pit at square (i,j), there is breeze at all adjacent squares. If there is breeze at square (i,j), there is a pit at one or more of the adjacent squares. There is one and only one monster (no more, no fewer). Squares (1,1), (1,2), (2,1), (2,2) have no monsters and no pits. The number of pits can be between 1 and 11. We don't care about gold, glitter, and arrows, there will be no information about them in the knowledge base, and no reference to them in the statement. Sample code The following code implements, in Java and C++, a system that reads text files containing information for the knowledge base and the statement whose truth we want to check. Feel free to use that code and build on top of it. Also feel free to ignore that code and start from scratch. Java: files CheckTrueFalse.java and LogicalExpression.java C++: files check_true_false.cpp and check_true_false.h Python (ver 2.4): check_true_false.py and logical_expression.py. (Zipped version of files here). You can test this code, by compiling on omega, and running on input files a.txt, b.txt, and c.txt. For example, for the Java code you can run it as: javac *.java java CheckTrueFalse a.txt b.txt c.txt and for C++, you can do: g++ -o check_true_false check_true_false.cpp ./check_true_false a.txt b.txt c.txt Efficiency Brute-force enumeration of the 264 possible assignments to the 64 Boolean variables will be too inefficient to produce answers in a reasonable amount of time. Because of that, we will only be testing your solutions with cases where the additional knowledge file contains specific information about at least 48 of the symbols. For example, suppose that the agent has already been at square (2,3). Then, the agent knows for that square that: There is no monster (otherwise the agent would have died). There is no pit (otherwise the agent would have died). Furthermore, the agent knows whether or not there is stench and/or breeze at that square. Suppose that, in our example, there is breeze and no stench. Then, the additional knowledge file would contain these lines for square 2,3: (not M_2_3) (not P_2_3) B_2_3 (not S_2_3) You can assume that, in all our test cases, there will be at least 48 lines like these four lines shown above, specifying for at least 48 symbols whether they are true or false. Assuming that you implement the TT-Entails algorithm, your program should identify those symbols and their values right at the beginning. You can identify those symbols using these guidelines: Note that the sample code stores the knowledge base as a LogicalExpression object, whose connective at the root is an AND. Let's call this LogicalExpression object knowledge_base. Suppose that you have a line such as "B_2_3" in the additional knowledge file. Such a line generates a child of knowledge_base that is a leaf, and has its "symbol" variable set to "B_2_3". You can write code that explicitly looks for such children of knowledge_base. Suppose that you have a line such as "(not M_2_3") in the additional knowledge file. Such a line generates a child of knowledge_base whose connective is NOT, and whose only child is a leaf with its "symbol" variable set to "M_2_3". You can write code that explicitly looks for such children of knowledge_base. This way, your program will be able to initialize the model that TT-Entails passes to TT-Check-All with boolean assignments for at least 48 symbols, as opposed to passing an empty model. The list of symbols passed from TT-Entails to TT-Check-All should obviously NOT include the symbols that have been assigned values in the initial model. This way, at most 16 symbols will have unspecified values, and TT-Check-All will need to check at most 216 rows in the truth table, which is quite doable in a reasonable amount of time (a few seconds).

In this assignment you will write smallsh your own shell in C. smallsh will implement a subset of features of well-known shells, such as bash. Your program will Provide a prompt for running commands Handle blank lines and comments, which are lines beginning with the # character Provide expansion for the variable $$ Execute 3 commands exit, cd, and status via code built into the shell Execute other commands by creating new processes using a function from the exec family of functions Support input and output redirection Support running commands in foreground and background processes Implement custom handlers for 2 signals, SIGINT and SIGTSTP Learning Outcomes After successful completion of this assignment, you should be able to do the following Describe the Unix process API (Module 4, MLO 2) Write programs using the Unix process API (Module 4, MLO 3) Explain the concept of signals and their uses (Module 5, MLO 2) Write programs using the Unix API for signal handling (Module 5, MLO 3) Explain I/O redirection and write programs that can employ I/O redirection (Module 5, MLO 4) Program Functionality 1. The Command Prompt Use the colon : symbol as a prompt for each command line. The general syntax of a command line is: command [arg1 arg2 ...] [< input_file] [> output_file] [&] …where items in square brackets are optional. You can assume that a command is made up of words separated by spaces. The special symbols <, > and & are recognized, but they must be surrounded by spaces like other words. If the command is to be executed in the background, the last word must be &. If the & character appears anywhere else, just treat it as normal text. If standard input or output is to be redirected, the > or < words followed by a filename word must appear after all the arguments. Input redirection can appear before or after output redirection. Your shell does not need to support any quoting; so arguments with spaces inside them are not possible. We are also not implementing the pipe "|" operator. Your shell must support command lines with a maximum length of 2048 characters, and a maximum of 512 arguments. You do not need to do any error checking on the syntax of the command line. 2. Comments & Blank Lines Your shell should allow blank lines and comments. Any line that begins with the # character is a comment line and should be ignored. Mid-line comments, such as the C-style //, will not be supported. A blank line (one without any commands) should also do nothing. Your shell should just re-prompt for another command when it receives either a blank line or a comment line. 3. Expansion of Variable $$ Your program must expand any instance of "$$" in a command into the process ID of the smallsh itself. Your shell does not otherwise perform variable expansion. 4. Built-in Commands Your shell will support three built-in commands: exit, cd, and status. These three built-in commands are the only ones that your shell will handle itself - all others are simply passed on to a member of the exec() family of functions. You do not have to support input/output redirection for these built in commands These commands do not have to set any exit status. If the user tries to run one of these built-in commands in the background with the & option, ignore that option and run the command in the foreground anyway (i.e. don't display an error, just run the command in the foreground). exit The exit command exits your shell. It takes no arguments. When this command is run, your shell must kill any other processes or jobs that your shell has started before it terminates itself. cd The cd command changes the working directory of smallsh. By itself - with no arguments - it changes to the directory specified in the HOME environment variable This is typically not the location where smallsh was executed from, unless your shell executable is located in the HOME directory, in which case these are the same. This command can also take one argument: the path of a directory to change to. Your cd command should support both absolute and relative paths. status The status command prints out either the exit status or the terminating signal of the last foreground process ran by your shell. If this command is run before any foreground command is run, then it should simply return the exit status 0. The three built-in shell commands do not count as foreground processes for the purposes of this built-in command - i.e., status should ignore built-in commands. 5. Executing Other Commands Your shell will execute any commands other than the 3 built-in command by using fork(), exec() and waitpid() Whenever a non-built in command is received, the parent (i.e., smallsh) will fork off a child. The child will use a function from the exec() family of functions to run the command. Your shell should use the PATH variable to look for non-built in commands, and it should allow shell scripts to be executed If a command fails because the shell could not find the command to run, then the shell will print an error message and set the exit status to 1 A child process must terminate after running a command (whether the command is successful or it fails). 6. Input & Output Redirection You must do any input and/or output redirection using dup2(). The redirection must be done before using exec() to run the command. An input file redirected via stdin should be opened for reading only; if your shell cannot open the file for reading, it should print an error message and set the exit status to 1 (but don't exit the shell). Similarly, an output file redirected via stdout should be opened for writing only; it should be truncated if it already exists or created if it does not exist. If your shell cannot open the output file it should print an error message and set the exit status to 1 (but don't exit the shell). Both stdin and stdout for a command can be redirected at the same time (see example below). 7. Executing Commands in Foreground & Background Foreground Commands Any command without an & at the end must be run as a foreground command and the shell must wait for the completion of the command before prompting for the next command. For such commands, the parent shell does NOT return command line access and control to the user until the child terminates. Background Commands Any non built-in command with an & at the end must be run as a background command and the shell must not wait for such a command to complete. For such commands, the parent must return command line access and control to the user immediately after forking off the child. The shell will print the process id of a background process when it begins. When a background process terminates, a message showing the process id and exit status will be printed. This message must be printed just before the prompt for a new command is displayed. If the user doesn't redirect the standard input for a background command, then standard input should be redirected to /dev/null If the user doesn't redirect the standard output for a background command, then standard output should be redirected to /dev/null 8. Signals SIGINT & SIGTSTP SIGINT A CTRL-C command from the keyboard sends a SIGINT signal to the parent process and all children at the same time (this is a built-in part of Linux). Your shell, i.e., the parent process, must ignore SIGINT Any children running as background processes must ignore SIGINT A child running as a foreground process must terminate itself when it receives SIGINT The parent must not attempt to terminate the foreground child process; instead the foreground child (if any) must terminate itself on receipt of this signal. If a child foreground process is killed by a signal, the parent must immediately print out the number of the signal that killed it's foreground child process (see the example) before prompting the user for the next command. SIGTSTP A CTRL-Z command from the keyboard sends a SIGTSTP signal to your parent shell process and all children at the same time (this is a built-in part of Linux). A child, if any, running as a foreground process must ignore SIGTSTP. Any children running as background process must ignore SIGTSTP. When the parent process running the shell receives SIGTSTP The shell must display an informative message (see below) immediately if it's sitting at the prompt, or immediately after any currently running foreground process has terminated The shell then enters a state where subsequent commands can no longer be run in the background. In this state, the & operator should simply be ignored, i.e., all such commands are run as if they were foreground processes. If the user sends SIGTSTP again, then your shell will Display another informative message (see below) immediately after any currently running foreground process terminates The shell then returns back to the normal condition where the & operator is once again honored for subsequent commands, allowing them to be executed in the background. See the example below for usage and the exact syntax which you must use for these two informative messages. Sample Program Execution Here is an example run using smallsh. Note that CTRL-C has no effect towards the bottom of the example, when it's used while sitting at the command prompt: $ smallsh : ls junk smallsh smallsh.c : ls > junk : status exit value 0 : cat junk junk smallsh smallsh.c : wc < junk > junk2 : wc < junk 3 3 23 : test -f badfile : status exit value 1 : wc < badfile cannot open badfile for input : status exit value 1 : badfile badfile: no such file or directory : sleep 5 ^Cterminated by signal 2 : status & terminated by signal 2 : sleep 15 & background pid is 4923 : ps PID TTY TIME CMD 4923 pts/0 00:00:00 sleep 4564 pts/0 00:00:03 bash 4867 pts/0 00:01:32 smallsh 4927 pts/0 00:00:00 ps : : # that was a blank command line, this is a comment line : background pid 4923 is done: exit value 0 : # the background sleep finally finished : sleep 30 & background pid is 4941 : kill -15 4941 background pid 4941 is done: terminated by signal 15 : pwd /nfs/stak/users/chaudhrn/CS344/prog3 : cd : pwd /nfs/stak/users/chaudhrn : cd CS344 : pwd /nfs/stak/users/chaudhrn/CS344 : echo 4867 4867 : echo $$ 4867 : ^C^Z Entering foreground-only mode (& is now ignored) : date Mon Jan 2 11:24:33 PST 2017 : sleep 5 & : date Mon Jan 2 11:24:38 PST 2017 : ^Z Exiting foreground-only mode : date Mon Jan 2 11:24:39 PST 2017 : sleep 5 & background pid is 4963 : date Mon Jan 2 11:24:39 PST 2017 : exit $ Hints & Resources 1. The Command Prompt Be sure you flush out the output buffers each time you print, as the text that you're outputting may not reach the screen until you do in this kind of interactive program. To do this, call fflush() immediately after each and every time you output text. Consider defining a struct in which you can store all the different elements included in a command. Then as you parse a command, you can set the value of members of a variable of this struct type. 2. Comments & Blank Lines This should be simple. 3. Expansion of Variable $$ Here are examples to illustrate the required behavior. Suppose the process ID of smallsh is 179. Then The string foo$$$$ in the command is converted to foo179179 The string foo$$$ in the command is converted to foo179$ 4. Built-in Commands It is recommended that you program the built-in commands first, before tackling the commands that require fork(), exec() and waitpid(). The built-in commands don't set the value of status. This means that however you are keeping track of the status, don't change it after the execution of a built-in command. A process can use chdir() (Links to an external site.) to change its directory. To test the implementation of the cd command in smallsh, don't use getenv("PWD") because it will not give you the correct result. Instead, you can use the function getcwd() (Links to an external site.). Here is why getenv("PWD") doesn't give you the correct result: PWD is an environment variable. As discussed in Module 4, Exploration: Environment "When a parent process forks a child process, the child process inherits the environment of its parent process." When you run smallsh from a bash shell, smallsh inherits the environment of this bash shell The value of PWD in the bash shell is set to the directory in which you are when you run the command to start smallsh smallsh inherits this value of PWD. When you change the directory in smallsh, it doesn't update the value of the environment variable PWD 5. Executing Other Commands Note that if exec() is told to execute something that it cannot do, like run a program that doesn't exist, it will fail, and return the reason why. In this case, your shell should indicate to the user that a command could not be executed (which you know because exec() returned an error), and set the value retrieved by the built-in status command to 1. Make sure that the child process that has had an exec() call fail terminates itself, or else it often loops back up to the top and tries to become a parent shell. This is easy to spot: if the output of the grading script seems to be repeating itself, then you've likely got a child process that didn't terminate after a failed exec(). You can choose any function in the exec() family. However, we suggest that using either execlp() or execvp() will be simplest because of the following reasons smallsh doesn't need to pass a new environment to the program. So the additional functionality provided by the exec() functions with names ending in e is not required. One example of a command that smallsh needs to run is ls (the graders will try this command at the start of the testing). Running this command will be a lot easier using the exec() functions that search the PATH environment variable. 6. Input & Output Redirection We recommend that the needed input/output redirection should be done in the child process. Note that after using dup2() to set up the redirection, the redirection symbol and redirection destination/source are NOT passed into the exec command For example, if the command given is ls > junk, then you handle the redirection to "junk" with dup2() and then simply pass ls into exec(). 7. Executing Commands in Foreground & Background Foreground Commands For a foreground command, it is recommend to have the parent simply call waitpid() on the child, while it waits. Background Commands The shell should respect the input and output redirection operators for a command regardless of whether the command is to be run in the foreground or the background. This means that a background command should use /dev/null for input only when input redirection is not specified in the command. Similarly a background command should use /dev/null for output only when output redirection is not specified in the command. Your parent shell will need to periodically check for the background child processes to complete, so that they can be cleaned up, as the shell continues to run and process commands. Consider storing the PIDs of non-completed background processes in an array. Then every time BEFORE returning access to the command line to the user, you can check the status of these processes using waitpid(...NOHANG...). Alternatively, you may use a signal handler to immediately wait() for child processes that terminate, as opposed to periodically checking a list of started background processes The time to print out when these background processes have completed is just BEFORE command line access and control are returned to the user, every time that happens. 8. Signals SIGINT & SIGTSTP Reentrancy is important when we consider that signal handlers cause jumps in execution that cause problems with certain functions. Note that the printf() family of functions is NOT reentrant. In your signal handlers, when outputting text, you must use other output functions! What to turn in? You can only use C for coding this assignment and you must use the gcc compiler. You can use C99 or GNU99 standard or the default standard used by the gcc installation on os1. Your assignment will be graded on os1. Submit a single zip file with all your code, which can be in as many different files as you want. This zip file must be named youronid_program3.zip where youronid should be replaced by your own ONID. E.g., if chaudhrn was submitting the assignment, the file must be named chaudhrn_program3.zip. In the zip file, you must include a text file called README.txt that contains instructions on how to compile your code using gcc to create an executable file that must be named smallsh. Your zip file should not contain any extraneous files. In particular, make sure not to zip up the __MACOSX directories. When you resubmit a file in Canvas, Canvas can attach a suffix to the file, e.g., the file name may become chaudhrn_program3-1.zip. Don't worry about this name change as no points will be deducted because of this. Caution During the development of this program, take extra care to only do your work on os1, our class server, as your software will likely negatively impact whatever machine it runs on, especially before it is finished. If you cause trouble on one of the non-class, public servers, it could hurt your grade! If you are having trouble logging in to any of our EECS servers because of runaway processes, please use this page to kill off any programs running on your account that might be blocking your access: T.E.A.C.H. - The Engineering Accounts and Classes HomepageLinks to an external site. Grading Criteria This assignment is worth 20% of your grade and there are 180 points available for it. 170 points are available in the test script, while the final 10 points will be based on your style, readability, and commenting. Comment well, often, and verbosely: we want to see that you are telling us WHY you are doing things, in addition to telling us WHAT you are doing. Once the program is compiled, according to your specifications given in README.txt, your shell will be executed to run a few sample commands against (ls, status, exit, in that order). If the program does not successfully work on those commands, it will receive a zero. If it works, then the grading script will be run against it (as detailed below) for final grading. Points will be assigned according to the grading script running on our class server only. Grading Method Here is the grading script p3testscript. It is a bash script that starts the smallsh program and runs commands on smallsh's command line. Most of the commands run by the grading script are very similar to the commands shown in the section Sample Program Execution. You can open the script in a text editor. The comments in the script will show you the points for individual items. Use the script to prepare for your grade, as this is how it's being earned. To run the script, place it in the same directory as your compiled shell, chmod it (chmod +x ./p3testscript) and run this command from a bash prompt: $ ./p3testscript 2>&1 or $ ./p3testscript 2>&1 | more or $ ./p3testscript > mytestresults 2>&1 Do not worry if the spacing, indentation, or look of the output of the script is different than when you run it interactively: that won’t affect your grade. The script may add extra colons at the beginning of lines or do other weird things, like put output about terminating processes further down the script than you intended. If your program does not work with the grading script, and you instead request that we grade your script by hand, we will apply a 15% reduction to your final score. So from the very beginning, make sure that you work with the grading script on our class server!

:black_square_button: Your text deserves to be placed in an emoji frame

Precision creative building tools for Forge (1.10.2 & 1.11.2) from a former dev of VoxelSniper. T-Square seeks to avoid all text commands for a fully mouse-driven experience.

Arduino code for text and images to display on MeU Square

A sublime text plugin to draw square(一个sublime text的插件，用于绘制矩形）

A metrically square monospaced font for displaying text-based graphics without the need to fiddle with line height and letter spacing

Program for the Hallowing to create a name badge. Background, border, and text color can be changed with the capacitive touch 'teeth' at the bottom. One of the teeth also draws a bunch of random round squares on the background color.

The Trivia Maze will be a Java based application that uses text-based console to generate a GUI for the ease of use from the player. This maze will be an 4x4 square where the start of the maze is at the top left and end is at the bottom right. To move from “room” to “room” the player will have to answer a randomly selected question.

We explore image-text cross modal representation using linear techniques like Canonical Correlation Analysis (CCA) and it's non linear variant Deep CCA with different kinds of losses - Mean Squared Loss and Triplet Loss. We then move onto to the main theme of our project, learning video-text representations and doing so using a proxy task of alignment using Drop-Dynamic Time Warping (Drop-DTW) on an instructional video dataset

Lab Experiments: PART A 1. Write a JavaScript to design a simple calculator to perform the following operations: sum, product, difference and quotient. 2. Write a JavaScript that calculates the squares and cubes of the numbers from 0 to 10 and outputs HTML text that displays the resulting values in an HTML table format. 3. Write a JavaScript code that displays text “TEXT-GROWING” with increasing font size in the interval of 100ms in RED COLOR, when the font size reaches 50pt it displays “TEXT-SHRINKING” in BLUE color. Then the font size decreases to 5pt. 4. Develop and demonstrate a HTML5 file that includes JavaScript script that uses functions for the following problems: a. Parameter: A string b. Output: The position in the string of the left-most vowel c. Parameter: A number d. Output: The number with its digits in the reverse order 5. Design an XML document to store information about a student in an engineering college affiliated to VTU. The information must include USN, Name, and Name of the College, Branch, Year of Joining, and email id. Make up sample data for 3 students. Create a CSS style sheet and use it to display the document. 6. Write a PHP program to keep track of the number of visitors visiting the web page and to display this count of visitors, with proper headings. 7. Write a PHP program to display a digital clock which displays the current time of the server. 8. Write the PHP programs to do the following: a. Implement simple calculator operations. b. Find the transpose of a matrix. c. Multiplication of two matrices. d. Addition of two matrices. 9. Write a PHP program named states.py that declares a variable states with value "Mississippi Alabama Texas Massachusetts Kansas". write a PHP program that does the following: a. Search for a word in variable states that ends in xas. Store this word in element 0 of a list named statesList. b. Search for a word in states that begins with k and ends in s. Perform a caseinsensitive comparison. [Note: Passing re.Ias a second parameter to method compile performs a case-insensitive comparison.] Store this word in element1 of statesList. c. Search for a word in states that begins with M and ends in s. Store this word in element 2 of the list. d. Search for a word in states that ends in a. Store this word in element 3 of the list. 10. Write a PHP program to sort the student records which are stored in the database using selection sort.