Explain that mypy should be run in the package root directory

[JukkaL]

If I have a package pkg/ and I run mypy while the current working directory is pkg, mypy can't resolve imports from pkg. This is consistent with how Python works (see #7389 for discussion), but it may be surprising for some users. Mypy could detect this issue and generate a note that would tell the user to switch to another directory.

More details: If an imported module can't be resolved, but the current working directory contains a __init__.py[i] file, see if the import could be resolved if some parent directory was added to the search path. If yes, add a note suggesting that the current working directory should perhaps be changed to a parent directory.

[Shashankjain12]

hello @JukkaL can you assign me the issue so that I can start working on this particular issue?

[JelleZijlstra]

@Shashankjain12 feel free to just start working on this.

[Shashankjain12]

hello @JelleZijlstra i am new to open source can you suggest me which file to edit in order to prompt users that they are in wrong directory while executing the code?

[JukkaL]

@Shashankjain12 You'll probably need to edit mypy/build.py (and/or maybe some other module imported there). One way to move forward is to find the code that generates the error message about the import, and look around there.