Bug: exceptiongroup backport is missing on Python 3.10

[mtvx]

Description

Code expects exceptiongroup backport to be installed in

litestar/litestar/utils/helpers.py

Line 101 in 6e4e530

from exceptiongroup import ExceptionGroup as _ExceptionGroup # pyright: ignore

However, it's only declared for dev dependencies in

litestar/pyproject.toml

Line 109 in 6e4e530

"exceptiongroup; python_version < \"3.11\"",

so after litestar install it won't be found and one has to manually require it now.

Running Python 3.10.

Logs

Full stacktrace (failure on launch):

Traceback (most recent call last):
  File "/home/api/.local/lib/python3.10/site-packages/litestar/utils/helpers.py", line 99, in get_exception_group
    return cast("type[BaseException]", ExceptionGroup)  # type:ignore[name-defined]
NameError: name 'ExceptionGroup' is not defined. Did you mean: '_ExceptionGroup'?

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/local/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/myproject/api/myproject/cloud_management/new_app.py", line 4, in <module>
    from litestar import Litestar
  File "/home/api/.local/lib/python3.10/site-packages/litestar/__init__.py", line 1, in <module>
    from litestar.app import Litestar
  File "/home/api/.local/lib/python3.10/site-packages/litestar/app.py", line 20, in <module>
    from litestar._openapi.plugin import OpenAPIPlugin
  File "/home/api/.local/lib/python3.10/site-packages/litestar/_openapi/plugin.py", line 10, in <module>
    from litestar.routes import HTTPRoute
  File "/home/api/.local/lib/python3.10/site-packages/litestar/routes/__init__.py", line 1, in <module>
    from .asgi import ASGIRoute
  File "/home/api/.local/lib/python3.10/site-packages/litestar/routes/asgi.py", line 7, in <module>
    from litestar.routes.base import BaseRoute
  File "/home/api/.local/lib/python3.10/site-packages/litestar/routes/base.py", line 13, in <module>
    from litestar._kwargs import KwargsModel
  File "/home/api/.local/lib/python3.10/site-packages/litestar/_kwargs/__init__.py", line 1, in <module>
    from .kwargs_model import KwargsModel
  File "/home/api/.local/lib/python3.10/site-packages/litestar/_kwargs/kwargs_model.py", line 49, in <module>
    _ExceptionGroup = get_exception_group()
  File "/home/api/.local/lib/python3.10/site-packages/litestar/utils/helpers.py", line 101, in get_exception_group
    from exceptiongroup import ExceptionGroup as _ExceptionGroup  # pyright: ignore
ModuleNotFoundError: No module named 'exceptiongroup'

Litestar Version

2.5.1

Platform

• Linux
• Mac
• Windows
• Other (Please specify in the description above)

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[peterschutt]

Thanks, this was originally a testing utility that was moved into the main lib at some point and this would have been missed. PR welcome!

[github-actions]

A fix for this issue has been released in v2.5.2