example1.py

import os
from tkinter import Tk
root = Tk()
root.minsize(300, 100)
# Add Icon to windows Titlebar if running Windows.
if os.name == 'nt':
    homepath = os.path.expanduser('~')
    tempFile = '%s\Caveman Software\%s' % (homepath, 'Icon\icon.ico')

    if (os.path.exists(tempFile) == True):
        root.wm_iconbitmap(default=tempFile)

    else:
        import create_icon
        print('File Created')
        root.wm_iconbitmap(default=tempFile)

root.mainloop()