Python 3.14 sort is broken due to import

[dlroy88osu]

ImportError: cannot import name 'Str' from 'ast' (C:\Users\SOMEUSER\AppData\Local\Programs\Python\Python314\Lib\ast.py)

2025-10-12 16:02:59.162 [info] [Error - 4:02:59 PM] Server initialization failed.
2025-10-12 16:02:59.162 [info] Message: Pending response rejected since connection got disposed
Code: -32097
2025-10-12 16:02:59.162 [info] [Error - 4:02:59 PM] The isort server crashed 5 times in the last 3 minutes. The server will not be restarted. See the output for more information.
2025-10-12 16:02:59.162 [info] [Error - 4:02:59 PM] isort client: couldn't create connection to server.
2025-10-12 16:02:59.162 [info] Message: Pending response rejected since connection got disposed
Code: -32097
2025-10-12 16:02:59.163 [info] [Error - 4:02:59 PM] Restarting server failed
2025-10-12 16:02:59.163 [info] Message: Pending response rejected since connection got disposed
Code: -32097

[dancollins]

Similar issue here:

> python --version 
Python 3.14.0

And error logs:

2025-11-10 10:08:29.335 [info] [Error - 10:08:29 AM] Restarting server failed
2025-11-10 10:08:29.335 [info]   Message: Pending response rejected since connection got disposed
  Code: -32097 
2025-11-10 10:08:30.299 [info] Traceback (most recent call last):

2025-11-10 10:08:30.299 [info]   File "c:\Users\DanCollins\.windsurf\extensions\ms-python.isort-2023.11.0-dev-universal\bundled\tool\lsp_server.py", line 42, in <module>
    from pygls import server, uris, workspace
  File "c:\Users\DanCollins\.windsurf\extensions\ms-python.isort-2023.11.0-dev-universal\bundled\libs\pygls\server.py", line 27, in <module>
    from pygls.lsp import ConfigCallbackType, ShowDocumentCallbackType
  File "c:\Users\DanCollins\.windsurf\extensions\ms-python.isort-2023.11.0-dev-universal\bundled\libs\pygls\lsp\__init__.py", line 36, in <module>
    from typeguard import check_type
  File "c:\Users\DanCollins\.windsurf\extensions\ms-python.isort-2023.11.0-dev-universal\bundled\libs\typeguard\__init__.py", line 12, in <module>
    from ._decorators import typechecked as typechecked
  File "c:\Users\DanCollins\.windsurf\extensions\ms-python.isort-2023.11.0-dev-universal\bundled\libs\typeguard\_decorators.py", line 13, in <module>
    from ._transformer import TypeguardTransformer
  File "c:\Users\DanCollins\.windsurf\extensions\ms-python.isort-2023.11.0-dev-universal\bundled\libs\typeguard\_transformer.py", line 5, in <module>
    from ast import (
    ...<48 lines>...
    )

2025-11-10 10:08:30.299 [info] ImportError: cannot import name 'Str' from 'ast' (c:\Users\DanCollins\.conda\envs\sbp\Lib\ast.py)

2025-11-10 10:08:30.387 [info] [Error - 10:08:30 AM] Server initialization failed.
2025-11-10 10:08:30.387 [info]   Message: Pending response rejected since connection got disposed
  Code: -32097 
2025-11-10 10:08:30.387 [info] [Error - 10:08:30 AM] The isort server crashed 5 times in the last 3 minutes. The server will not be restarted. See the output for more information.
2025-11-10 10:08:30.387 [info] [Error - 10:08:30 AM] isort client: couldn't create connection to server.
2025-11-10 10:08:30.387 [info]   Message: Pending response rejected since connection got disposed
  Code: -32097 
2025-11-10 10:08:30.387 [info] [Error - 10:08:30 AM] Restarting server failed
2025-11-10 10:08:30.387 [info]   Message: Pending response rejected since connection got disposed
  Code: -32097

I found ast.Str was deprecated back in Python 3.8, warnings added in Python 3.12 and then removed for Python. 3.14: python/cpython#119563. I also see the docs have a task to be updated: python/cpython#137063

[sameerdhoot]

I have similar issues. Python 3.14.0, OS: Windows 11, IDE: Cursor

[monokal]

Confirmed via the ms-python.isort extension for VSCode/Cursor too.