CH2: Creat a GUI (170116 - 0123)

The task of ch2： Creat a GUI program, let it runs as an OOP,realize these functions:

Enter 'help' to get more help;

Enter 'History' to get the search history;

Enter 'Quit' to exit the programming

The file.py should submit with a README.md attachment.Make sure everyone can understand what you wrote and can run the GUI and finish all the function.