Stopped working with python 3.13 on macos

[rafjaf]

Hello,

FreesimpleGUI stopped working for me after upgragding to python 3.13 on macos. It got the following error message (redacted):

Traceback (most recent call last):
...
  File ".../lib/python3.12/site-packages/FreeSimpleGUI/window.py", line 470, in __init__
    self.Finalize()
  File ".../lib/python3.12/site-packages/FreeSimpleGUI/window.py", line 1178, in finalize
    self.Read(timeout=1)
  File ".../lib/python3.12/site-packages/FreeSimpleGUI/window.py", line 959, in read
    results = self._read(timeout=timeout, timeout_key=timeout_key)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../lib/python3.12/site-packages/FreeSimpleGUI/window.py", line 1038, in _read
    self._Show()
  File ".../lib/python3.12/site-packages/FreeSimpleGUI/window.py", line 762, in _Show
    StartupTK(self)
  File ".../lib/python3.12/site-packages/FreeSimpleGUI/__init__.py", line 6999, in StartupTK
    window._create_thread_queue()
  File ".../lib/python3.12/site-packages/FreeSimpleGUI/window.py", line 2470, in _create_thread_queue
    self.thread_strvar.trace('w', self._window_tkvar_changed_callback)
  File "/opt/homebrew/Cellar/python@3.12/3.12.7_1/Frameworks/Python.framework/Ve
rsions/3.12/lib/python3.12/tkinter/__init__.py", line 506, in trace_variable
    self._tk.call("trace", "variable", self._name, mode, cbname)
_tkinter.TclError: bad option "variable": must be add, info, or remove

I was able to solve this with a little help from ChatGPT by replacing line 2470 of window.py by the following text:

            try:
                self.thread_strvar.trace_add('write', self._window_tkvar_changed_callback)
            except AttributeError:
                self.thread_strvar.trace('w', self._window_tkvar_changed_callback)

Apparently, tkinter's API changed in version 3.13 of python, trace having been replaced by trace_add

I hope it helps

[gfrewqpoiu]

Can confirm that this patch works.
Seems to be an incompatible change because of Python installed on macOS with Homebrew using TK 9 even though Python itself has not been updated for this yet. This issue should not appear when installing Python with the Installer from python.org
Would love to see a fix for this merged though.

[spyoungtech]

Thank you for confirming the patch works. I just acquired a MacOS system this past week that will allow me to reproduce this and test the fix. I expect to be able to merge a patch in some time in the next week.

[spyoungtech]

A proposed fix is available in #55 on the gh-45 branch. I'll get around to testing/merging and releasing soon.

[spyoungtech]

The fix for this is now released in version 5.2.0