mypy seemingly can't find types for this package

[ezyang]

When I attempt to run mypy, I get:

ghstack/github_fake.py:1: error: Cannot find module named 'graphql'
ghstack/github_fake.py:1: note: See https://mypy.readthedocs.io/en/latest/running_mypy.html#missing-imports

Now, I know that you guys have types... but the mypy docs seem to suggest that you need to do something extra to get mypy to treat the third party package as having types?

As a temporary workaround, I've symlinked graphql in my local directory to graphql-core-next/graphql and that convinces mypy to check the ytpes.

[Cito]

How exactly did you call mypy? Note that the mypy command line tool expects a module file or folder name on the file system, not the name of an installed package.

[ezyang]

I just did mypy my_module.py, where my_module imports GraphQL-core-next

I believe the problem is that you need a py.typed file in your package directory. See https://mypy.readthedocs.io/en/latest/installed_packages.html#making-pep-561-compatible-packages

[Cito]

Oh, ok, now I understand. Yes, I believe you're right, there should be such an (empty) file as a marker. Will add this to the next version. Need to rethink the packaging anyway (#22).

Thanks a lot for pointing this out!

[Cito]

Version 1.0.3 with this fix is now available.