[CI] mypy install missing stubs

[AnirudhDagar]

This PR is a follow up to #4011 (see for more details) and fixes failing python type check CI #4009 by installing the missing stubs.

I've not reverted the change in #4011, let me know if that is recommended. Thank you :))

[datumbox]

@AnirudhDagar feel free to revert the ignoring to see if your update works and solve this properly.

Note that the CI is complaining because the change is not present on config.yml.in

[AnirudhDagar]

Thanks @datumbox, will fix that.

[AnirudhDagar]

We need to pass y, currently, the command sits and waits for that input. Any suggestions for the same?
mypy --install-types doesn't support a -y option to automatically do that.

EDIT: I'm thinking of yes | mypy --install-types @datumbox LMK

[AnirudhDagar]

@datumbox could you please help me here. Thanks in advance!

Since the output of mypy --install-types raises an error the CI automatically fails with that, without waiting for it to be fixed by installing the required stubs below

This is the output on my local machine but CI exits as soon as the error is raised.

~/Desktop/Work/vision fix-mypy ❯ yes | mypy --install-types                                                                           

torchvision/datasets/utils.py:204: error: Library stubs not installed for "requests" (or incompatible with Python 3.8)  [import]
        import requests
    ^
torchvision/datasets/utils.py:204: note: Hint: "python3 -m pip install types-requests"
torchvision/datasets/utils.py:204: note: (or run "mypy --install-types" to install all missing stub packages)
torchvision/datasets/utils.py:204: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
Found 1 error in 1 file (checked 110 source files)

Installing missing stub packages:
/Users/gollum/anaconda3/envs/vision/bin/python -m pip install types-requests

Install? [yN]
Collecting types-requests
  Using cached types_requests-0.1.8-py2.py3-none-any.whl (22 kB)
Installing collected packages: types-requests
Successfully installed types-requests-0.1.8

[AnirudhDagar]

The other option to fix this is more specific here. We can do pip install --user --progress-bar off types-requests instead of yes | mypy --install-types. I'll update the PR to see if that works.

[datumbox]

@AnirudhDagar I didn't intervene because you are doing all the checks and workarounds I would be doing as well. I'm not too familiar with all the changes that mypy did on the last version yesterday (part of the reason why I wanted a quick fix on #4011).

It's unclear to me why it's not blocking for install but hopefully your last modification will work. Let's see.

[datumbox]

LGTM, thanks!

[AnirudhDagar]

@datumbox Yeah I completely understand that a fast fix was required at the moment. Thank you :))

[NicolasHug]

Thanks @AnirudhDagar !