Error when importing altair using Python 3.13

[rikardn]

What happened?

I am testing altair 5.4.1 with Python 3.13 rc2 and got the following error when trying to import:

$ python
Python 3.13.0rc2 (main, Oct  1 2024, 14:50:48) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import altair
Traceback (most recent call last):
  File "<python-input-0>", line 1, in <module>
    import altair
  File "/home/devel/pharmpy/.tox/py313/lib/python3.13/site-packages/altair/__init__.py", line 650, in <module>
    from altair.vegalite import *
  File "/home/devel/pharmpy/.tox/py313/lib/python3.13/site-packages/altair/vegalite/__init__.py", line 2, in <module>
    from .v5 import *
  File "/home/devel/pharmpy/.tox/py313/lib/python3.13/site-packages/altair/vegalite/v5/__init__.py", line 4, in <module>
    from .api import *
  File "/home/devel/pharmpy/.tox/py313/lib/python3.13/site-packages/altair/vegalite/v5/api.py", line 618, in <module>
    class _ConditionClosed(TypedDict, closed=True, total=False):  # type: ignore[call-arg]
    ...<6 lines>...
        value: Any
TypeError: _TypedDictMeta.__new__() got an unexpected keyword argument 'closed'
>>> 

What would you like to happen instead?

No response

Which version of Altair are you using?

5.4.1

[dangotbanned]

@rikardn this will be fixed in the next release.
This PR is relevant

• ci: Bump typing_extensions python to 3.14 #3593

There is also a change here that is needed for PEP 728 support on 3.13:

altair/altair/vegalite/v5/api.py

Lines 36 to 39 in cabf1e6

	if sys.version_info >= (3, 14):
	from typing import TypedDict
	else:
	from typing_extensions import TypedDict

More generally though, altair cannot be tested on 3.13 due issues upstream.
I would recommend following these for progress towards 3.13 support:

• Preparing for Python 3.13 #3587
• ci: Support Python 3.13 #3591

[rikardn]

Thanks @dangotbanned for taking the time to explain the situation.