python tkinter with threading causing crash

Question

I have written a python tkinter code using threads so as the tkinter wizard updates automatically by tkinter mainloop running in the main thread and background process runni

Answer 1

Tkinter is not thread safe; you cannot access Tkinter widgets from anywhere but the main thread. You will need to refactor your code so that QueueHandler runs in the main thread.

Answer 2

As Bryan says Tkinter is not thread safe. Here is a modification that attempts to make it so: http://tkinter.unpythonic.net/wiki/mtTkinter

Answer 3

Tkinter is designed to be thread-safe but isn't due to bugs, in both 2.x and 3.x.

Until fixes are released (and in older versions), you should use mtTkinter (which is designed to be a drop-in replacement) as a workaround.