Feature req: -p (--package) arg supporting path to folder

[jamesbraza]

I am making a feature request for mypy, not raising a bug.

Within one repository, here is a use case:

• Package that follows native namespace packaging conventions.
• In a separate directory: unit tests, which are grouped as a native namespace package as well.
  • This is done so others can pip install and import example use cases from the unit test files
• One mypy config file, located in repo root
• Both the package + unit tests are type checked via mypy
  • Note per this comment: for PEP 420 support, mypy should be invoked via mypy -p <folder>

Spoiler alert, this is my use case. I would like to run mypy from the repo root, which requires one to invoke mypy via something like:

mypy -p rel/path/to/package

However, currently, it seems package names don't support slashes. When I enter mypy -p tests/packagename, here's my output:

Package name 'tests/packagename' cannot have a slash in it.

TL;DR the feature request: enable mypy support of relative paths to packages when using -p PACKAGE.

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Versions

mypy==0.782
Python==3.6.5

[gvanrossum]

You know the workaround is simple, right? The way -p is intended to work is

export MYPYPATH=tests
mypy -p packagename

[jamesbraza]

Haha thank you @gvanrossum ! That's exactly what I needed, I am very grateful.

I now think this feature request is unnecessary, so I am closing it.

I am a bit embarrassed, and will be re-reading the mypy docs on import discovery :)