Write a python script that demonstrate class and static methods

resolve non-efficted typo

Save last changes and re-commit

Write a python script that demonstrate polymorphism concept

Add __str__ dunder method for each class

Develop a simple library system and use inheritance and composition

Write a python script that represent Book class and use some under methods

Update some code for auto checker

Develop a Library Management System

pushing some auto genrated files for unit testing

Modification: modfy unit tests methods' name

Modification: Modify unit tests code structure

Write unit tests for simple calculator

Modification: rename method

Delelop a simple division calculator