Why does my Python while loop prevent my tkinter window from opening?

Question

In a tkinter GUI, I have a few classes, and at the end, a while loop. Without the while loop, everything works fine, save for the functions in the loop. But whenever I put the while loop on the end, the tkinter window didn't open. Here is some of my code:

while 1:
    Game['paper'] += Game['totalpps']/10
    time.sleep(0.1)

There is a lot I cut out, but I have a Game dictionary that has all the games data. But when the while loop is going, the tkinter window doesn't appear. Even after I put a time.sleep(5) before the while loop, the window didn't appear.

Any ideas why?

Any help is appreciated.

Note: I am using a raspberry pi, with the Raspbian OS.

When you call sleep, the application sleeps. That means it can't refresh the window. — Bryan Oakley, Jun 16 '20 at 22:49
Does this answer your question? [use after method to prevent main loop from freezing](https://stackoverflow.com/a/25753719/7414759) — stovfl, Jun 17 '20 at 08:19

score 1 · Answer 1 · answered Jun 16 '20 at 22:46

1

Threads can easily solve your problem:

from threading import Thread

# All this code must occur before calling window.mainloop()

def loop():
    while 1:
        Game['paper'] += Game['totalpps']/10
        time.sleep(0.1)

Thread(target=loop).start()

answered Jun 16 '20 at 22:46

Amin Guermazi

1,632
9
19

score 0 · Accepted Answer · answered Jul 08 '20 at 16:27

0

If you just put root.update() before the while loop and in the while loop, everything should work fine.

answered Jul 08 '20 at 16:27

cs1349459

911
9
27

Why does my Python while loop prevent my tkinter window from opening?

2 Answers2