what is a graphical user interface (gui) ython code example

Example 1: python gui builder

from tkinter import *

def changel():
    if l['text']!='Stop it!':
        l['text']='Stop it!'
    else:
        l['text']='Are you over?'

w = Tk()
l = Label(w,text = 'GUI Interface')
b = Button(w,text = 'A normal button',command = changel )
t = w.title('A normal window')
l.pack()
b.pack()
w.mainloop()

Example 2: python gui library

### Answer to: "" ###

###
#  You can find thirteen gui libraries for python here:
#  https://medium.com/issuehunt/13-python-gui-libraries-a6196dfb694
#
#  Personally, I like "Kivy".
###