Python: Variable Strength Password Generator

Scope of this Tutorial:

This generator uses Tkinter to create a GUI wrapper around the password generator functions/methods. It uses a visual color-coded system to indicate how strong the password is, and a slider to select how long the desired password will be. The code automatically places the generated password onto the system clipboard. This python code has also been optimized to work in both Python 2.xx and Python3.xx. The attached files are well commented.