Python 3 GUI Starting Point

python3_gui_template.py

#!/usr/bin/env python3

def main():

    # require Python 3
    import sys
    if sys.version_info.major < 3:
        print("This program requires Python 3 or later")
        return

    # import Python's standard GUI module
    import tkinter

    # create a window
    top = tkinter.Tk()

    # Code to add widgets will go here...

    # turn control over to tkinter
    # it can call back your code as necessary
    top.mainloop()

main()