4 different exercises making use of the Python OOP principles

• bank_account_manager.py - Manage credits and debits through an ATM style program. Written in Python 3 using OOP principles.
• black_jack.py - Simple text-base BlackJack game. Written in Python 2 using the principles of OOP.
• company_manager.py - Writen in Python 3 using OOP principles. A hierarchy of Employee classes and a Company class that allows you to manage the employees.
• tic_tac_toe.py - The classic game of Tic-Tac-Toe written in Python 2. Making use of functions and loops.