[issue38946] IDLE on macOS 10.15 Catalina does not open double-clicked files if app already launched

[Kevin Purrone]

Kevin Purrone <kevinpurrone at gmail.com> added the comment:

I have little experience posting in forums, so if this post is in the wrong place, please let me know. 

I am running Python3.9, with Apple OS 10.15.7
I was using IDLE successfully for a class in Python for the past three weeks, although I was rarely able to open a file by double clicking it. It actually worked a few times, but most of the time, nothing happened, and I would open IDLE first, and then open a file from its file menu. 

But today, IDLE will not open. When I click on the icon in the dock like I usually did, it seems to open for about .5 seconds, and then quits. Also, now when I double click on a .py file, IDLE will open for about .5 seconds and then quits. I reinstalled the package, but no change.

However, in terminal I can launch python with this command: python3.9. Then I can launch IDLE with this command: import idlelib.idle. The IDLE window opens, and I can open files from the file menu and they run as before. However, the title of the file menu is now "Python" where before, it was "IDLE"

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nosy: +KevinPurrone
versions: +Python 3.9 -Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38946>
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