PEP-696: `AttributeError: attribute '__default__' of 'typing.ParamSpec' objects is not writable` on Python 3.13

On Python 3.13.0b1, with typing-extensions 4.11.0 (latest at time of writing), [I get an error](https://github.com/HypothesisWorks/hypothesis/actions/runs/9143526585/job/25140283321?pr=3996#step:6:869):

```python-traceback
Traceback (most recent call last):
    ...
    File "hypothesis/hypothesis-python/tests/typing_extensions/test_backported_types.py", line 187, in test_callable_with_paramspec
      P = ParamSpec("P")
    File "python3.13/site-packages/typing_extensions.py", line 1512, in __new__
      _set_default(paramspec, default)
    File "python3.13/site-packages/typing_extensions.py", line 1375, in _set_default
      type_param.__default__ = None
  AttributeError: attribute '__default__' of 'typing.ParamSpec' objects is not writable
```

This looks like a bug, maybe related to https://github.com/python/typing_extensions/issues/396.

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Uh oh!

PEP-696: `AttributeError: attribute 'default' of 'typing.ParamSpec' objects is not writable` on Python 3.13 #404

Metadata

Assignees

Labels

Projects

Milestone

Relationships

Development

Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.

Uh oh!

PEP-696: AttributeError: attribute '__default__' of 'typing.ParamSpec' objects is not writable on Python 3.13 #404

Description

Metadata

Metadata

Assignees

Labels

Projects

Milestone

Relationships

Development

Issue actions

Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.

PEP-696: `AttributeError: attribute 'default' of 'typing.ParamSpec' objects is not writable` on Python 3.13 #404