mypy says "no type hints or library stubs" although it parses package's .pyi

[yanoom]

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: win10
• Poetry version: 1.0.5
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/yanoom/b0a757aa512e6cb0a122ca3cfbc7f416

Issue

We are in the process of releasing our library, called "Pyctuator".

I successfully created stubs for the package using stubgen.
I added the MYPYPATH environment variable with the location of the previously created "stub output folder" for mypy to find the stubs.

I use poetry run mypy on an example application that uses our new package:
I see that mypy is parsing the desired pyctuator.pyi

But still fails in the end stating that no type hints or library stubs have been found:

Your assistance is highly appreciated- thanks!
:)

[bryanforbes]

Did you include a py.typed file in pyctuator?

[fwallacevt]

@yanoom was this ever resolved?

[sobolevn]

I am facing the same issue with the 1.1.0 release.

[abn]

@sobolevn can you provide a bit more context please?

@yanoom I believe this was resolved in #2000 for 1.0.6. This was also resolved in python-poetry/poetry-core#28 and should be available in poetry-1.1.0 via poetry-core-1.0.0.

If you are building the wheen under PEP 517, you should update your pyproject.toml to use the following.

[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

[sobolevn]

@abn here's the full reproduction: dry-python/returns#659

Update: solved, by typeddjango/pytest-mypy-plugins#40

[abn]

@sobolevn am I correct in understanding that this was a plugin issue caused due to poetry's editable installs using dist-info insted of setuptool's egg-link mechanism for "develop" installs?

[sobolevn]

Yes, exactly. We needed to add a hack around MYPYPATH to make this working again.

[abn]

@sobolevn so I can close this issue then? Assuming there is nothing to be done on the poetry side since we are following standard mechanisms to load path into python site.

[sobolevn]

Yeap, this can be closed. Solution: use MYPYPATH env var or mypy_path option when mypy fails to detect your stubs.

[github-actions]

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