Jinja2 stub not installed

[patrick-5546]

When I run mypy I get the following error:

.tox/py310/lib/python3.10/site-packages/pandas-stubs/io/formats/style_render.pyi:13: error: Cannot find implementation or library stub for module named "jinja2"  [import]

I was thinking that this is because the jinja2-stubs package is not installed, but the weirdest part is that it doesn't happen all the time and only happens when I run it using tox. I have observed that mypy in tox passes when I first open a new terminal, but then it fails after a while. Any ideas on what might be happening, or how I could further troubleshoot this bug?

[twoertwein]

Does mypy use different config files (ignore_missing_imports) when you call it with/without tox?

[Dr-Irv]

As best as I can tell, jinja2 since version 3.0 is fully typed, so you don't need a jinja2-stubs package.

This issue is probably not an issue for pandas-stubs. It may be because you don't have jinja2 installed, or because of the settings in your environment.

Also, with mypy, it caches information from each time, so try it with the --no-incremental flag.