Error: The save file operation failed (IDLE - Python 3.10)

In Big Sur 11.6.1, if you attempt to save any code that you have entered either in idle, or more appropriate for Python 3.10, idle3, you get more than the Python code, as the idle header will also get saved to the file, rendering it useless until that header info is removed:

What I recommend that you do is to use idle3 to test the results of various Python 3.10 code, and when it does what you want, select and copy/paste the working code into a proper programmer's editor like Sublime Text 4. This is what I have done for years.

Next week, I will receive my M1 Pro MacBook Pro with Monterey, and I will be installing my Python 3.10 development environment on it.

Also, Barney-15E is correct that if you are launching idle, and not idle3, you are getting Tk/Tcl 8.5.9 which is long deprecated on macOS and may actually break now with Monterey. Python 3.10 includes the current Tk/Tcl bits in its bundle and is not dependent on what Apple has failed to update.

Use the following code to determine the Tk/Tcl version:

#!/usr/bin/env python3

import sys

try:
    import Tkinter as tk      # Python 2
except ImportError:
    import tkinter as tk      # Python 3

print("Tcl Version: {}".format(tk.Tcl().eval('info patchlevel')))
print("Tk Version: {}".format(tk.Tk().eval('info patchlevel')))
sys.exit()

My guess would be that IDLE (or more likely tkinter or tcl/tk) needs an update.

Based on the error, it is trying to open the file save dialog in the GUI.

I don't know if that is a tool within IDLE or if it is trying to open the Open/Save file framework in macOS.

Monterey removed some of the stuff in /usr/bin, so it is possible whatever it used to open the save dialog is missing.

Regardless of the cause, it appears IDLE needs an update to work in Monterey.

Hello,

Same here, the only difference is that if I'm working on my MacBook Pro (Monterey 12.0.1, Intel i7) everything works fine, whereas if I am on my iMac (Monterey 12.0.1, Intel i5) I get the same message as katarzyna185.

Any thoughts on this?

Thank you all