ModuleNotFoundError: No module named 'typing_extensions'

[leszekhanusz]

🐞 Describe the bug

After updating aiohttp from 3.6.2 to 3.7.0, the gql tests are failing on python 3.8 with the Exception ModuleNotFoundError: No module named 'typing_extensions'

tests/conftest.py:15: in <module>
    from aiohttp.test_utils import TestServer as AIOHTTPTestServer
.tox/py38/lib/python3.8/site-packages/aiohttp/test_utils.py:43: in <module>
    from .web import (
.tox/py38/lib/python3.8/site-packages/aiohttp/web.py:23: in <module>
    from .web_app import Application as Application
.tox/py38/lib/python3.8/site-packages/aiohttp/web_app.py:39: in <module>
    from .web_middlewares import _fix_request_current_app
.tox/py38/lib/python3.8/site-packages/aiohttp/web_middlewares.py:7: in <module>
    from .web_urldispatcher import SystemRoute
.tox/py38/lib/python3.8/site-packages/aiohttp/web_urldispatcher.py:36: in <module>
    from typing_extensions import TypedDict
E   ModuleNotFoundError: No module named 'typing_extensions'

💡 To Reproduce

Check the PR #156

[leszekhanusz]

Probably related to the aiohttp PR #5078 (6 days ago)

[asvetlov]

Thanks for the report!

[asvetlov]

Fixed by #5123

[xpkcs]

Hi, I'm still running into a similar issue with aiohttp v3.7.3.

I have a Docker image using Python 3.8 in which pipenv installs from a Pipfile.lock. In my Pipfile, I require python=3.8, but when I build the Pipfile.lock, the dependency typing-extensions has the marker:

"markers": "python_version < '3.8'",
"version": "==3.7.4.3"

Because of this, my pytests failed to find typing-extensions with the same error as the title of this issue.

I was able to get around this issue by explicitly requiring typing-extensions in my Pipfile, instead of implicitly installing it as a dependency of aiohttp, but it seems hacky.

[telemmaite]

Same issue as above with aiohttp==3.7.3

  File ".pyenv/versions/ENV-3.8.6/lib/python3.8/site-packages/aiohttp/http_parser.py", line 15, in <module>
    from .helpers import NO_EXTENSIONS, BaseTimerContext
  File ".pyenv/versions/ENV-3.8.6/lib/python3.8/site-packages/aiohttp/helpers.py", line 48, in <module>
    from typing_extensions import Protocol
ModuleNotFoundError: No module named 'typing_extensions'

[nomad-software]

I had the same issue, see: psf/black#1928 (comment)

[webknjaz]

Same issue as above with aiohttp==3.7.3

It can't be the same: e7dc844 + python/typing@c6c7dfd.