Can't work with tkinter.filedialog.askdirectory

[lin1987www]

• bleak version: 0.12.0
• Python version: 3.9.5
• Operating System: Win10 2004 (OS Build 19041.1052)

Description

when using import bleak and tkinter.filedialog.askdirectory will make program stop respond

What I Did

import bleak  # Even I didn't use anything, just import bleak, still cause problem
import tkinter as tk
from tkinter import filedialog

root = tk.Tk()
dest_path = filedialog.askdirectory()

If remove the line

import bleak

it will work just fine.

[dlech]

Given that you are using Python 3.9, I assume you are using the WinRT backend. This could be caused by microsoft/xlang#690 since both Bleak and Tkinter need to initialize the thread to use Windows APIs.

[dlech]

Does this work?

import bleak
import tkinter as tk
from tkinter import filedialog
from winrt import _winrt

_winrt.uninit_apartment()

root = tk.Tk()
dest_path = filedialog.askdirectory()

[lin1987www]

Yes! It works. Thanks you very much!

import bleak
import tkinter as tk
from tkinter import filedialog
from winrt import _winrt

_winrt.uninit_apartment()  # This line make filedialog.askdirectory() work

root = tk.Tk()
dest_path = filedialog.askdirectory()

But I still confuse, without _winrt.uninit_apartment() these similar methods below still work.

filedialog.asksaveasfile()
filedialog.asksaveasfilename()
filedialog.askopenfile()
filedialog.askopenfiles()
filedialog.askopenfilename()

What make filedialog.askdirectory() so special? Or maybe this is tkinter's issue?

If you have any idea, I would like to try.

[dlech]

import winrt calls RoInitialize with the default RO_INIT_MULTITHREADED. Most GUI toolkits on Windows need a single thread apartment instead. I think it is just by luck that the other dialogs worked without locking up.

[hbldh]

This shed a lot of light on problems using GUIs with Bleak. This should be addressed in #266.

Good work finding uninit_apartment! That is many steps closer to a root cause than I have found so far.