Running mypy with pdm

[gitpushdashf]

• [*] I have searched the issue tracker and believe that this is not a duplicate.

Steps to reproduce

(Write code that imports a 3rd party library that is typed.)
pdm add --dev mypy
pdm run mypy --strict .

Actual behavior

mypy can't find the type hints.

Expected behavior

mypy should be able to find the type hints, like it does with pipenv, virtualenv, poetry, etc.

[gitpushdashf]

Related: python/mypy#10633

Maybe not a pdm bug specifically, but probably worth mentioning.

[pawamoy]

There's a discussion here as well: #751

[JaviFuentes94]

Same issue here. Currently blocking the adoption of pdm at our team

[pawamoy]

Keep the upvotes coming on the mypy issue 🙂
I don't think there's anything PDM itself can do. I believe it's on mypy's side. Not sure what their constraints are, and why they can't use sys.path to find stubs.

[mferriz]

I started using pdm with mypy today. I do not see issues when using pyproject.toml to configure mypy:

[tool.mypy]
disallow_untyped_defs = true
disallow_incomplete_defs = true
python_version = "3.8"
strict = true
show_error_codes = true
warn_unused_ignores = true

When the configuration is set as above, command pdm run mypy src/*py executes as expected.

Hope this helps!

[gitpushdashf]

I started using pdm with mypy today. I do not see issues when using pyproject.toml to configure mypy:

[tool.mypy]
disallow_untyped_defs = true
disallow_incomplete_defs = true
python_version = "3.8"
strict = true
show_error_codes = true
warn_unused_ignores = true

When the configuration is set as above, command pdm run mypy src/*py executes as expected.

Hope this helps!

This definitely works, but unfortunately is very partial coverage. It's much better than none, but being able to do mypy --strict is very helpful.

[lyz-code]

Looks like they closed the mypy issue, what implications does that have for this issue?

[yakMM]

This can be closed imo, mypy is now properly working with __pypackages__