Error at any textual command: AttributeError: attribute '__default__' of 'typing.ParamSpec' objects is not writable

[Povidlo7]

When I run any command with textual(e. g.,textual diagnose) I get the output:

 _set_default(paramspec, default)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/typing_extensions.py", line 1412, in _set_default
    type_param.__default__ = None
    ^^^^^^^^^^^^^^^^^^^^^^
AttributeError: attribute '__default__' of 'typing.ParamSpec' objects is not writable

[github-actions]

We found the following entry in the FAQ which you may find helpful:

• How can I select and copy text in a Textual app?

Feel free to close this issue if you found an answer in the FAQ. Otherwise, please give us a little time to review.

This project is developed and maintained by Will McGugan. Consider sponsoring Will's work on this project (and others).

This is an automated reply, generated by FAQtory

[TomJGooding]

What version of Python are you using and how did you install Textual?

Have you tried checking what version of typing_extensions is installed?

[Povidlo7]

What version of Python are you using and how did you install Textual?

Have you tried checking what version of typing_extensions is installed?

I'm using Python 3.13.3 and I ran these 2 commands to install Textual

pip3 install textual
pip3 install textual-dev

and the typing_extensions version is 4.10.0

[TomJGooding]

You could try updating typing_extensions but it sounds maybe an issue with your environment: python/typing_extensions#527 (comment)

[github-actions]

I hope I solved your issue!

Consider sponsoring my work to continue to maintain and develop Textual.

• Will McGugan