Numpy.typing mypy plugin error

[Sednaoui]

I am having trouble adding numpy_typing to my project to use with mypy. Numpy docs explains that a mypy plugin is distributed with numpy.typing plugin.

Reproducing code example:

mypy.ini

[mypy]
plugins = numpy.typing.mypy_plugin

Error message:

Running mypy, I get this errror:

Error importing plugin 'numpy.typing.mypy_plugin': No module named 'numpy.typing

NumPy/Python version information:

1.19.4 3.8.5 (default, May 27 2021, 13:30:53) 
[GCC 9.3.0]

[BvB93]

Hi @Sednaoui, The mypy plugin will be a new addition in NumPy 1.21.0, while currently you're still using 1.19.4.

[Sednaoui]

got it thanks @BvB93! looking forward to it, great job

[q-wertz]

With numpy version 1.20.3 I can get it running using the following mypy.ini file (non valid .ini syntax)

import numpy

[mypy]
python_version = 3.9
plugins = numpy.typing.mypy_plugin
warn_return_any = True
warn_unused_configs = True

Don't really understand why and also I get the error

mypy.ini: File contains no section headers.
file: 'mypy.ini', line: 1
'import numpy\n'

but it seems to work 🤔

Maybe that's a workaround for the meantime…

[ikamensh]

Same problem: Error importing plugin 'numpy.typing.mypy_plugin': No module named 'numpy.typing' with numpy==1.21.3.

[BvB93]

Same problem: Error importing plugin 'numpy.typing.mypy_plugin': No module named 'numpy.typing' with numpy==1.21.3.

If the module cannot be found with numpy >= 1.21 then that would suggest it's grabbing an older numpy installation from somewhere. What does the output of print(np.__version__) show?

[rgommers]

That may be a different issue. The import works fine for me. So questions:

• Do import numpy and import numpy.typing work?
• Did you check numpy.__file__ and numpy.__version__ to ensure the package is really 1.21.3 (could be a mixup with venv's for example)?
• If so and it's really a bug, it's likely specific to the packaging/install method. How did you install numpy?

[ikamensh]

oh, figured it out. So I was in a virtual environment and had correct numpy version as reported (1.21.3), but didn't have mypy in this virtual environment. I had a global mypy installation with numpy==1.18.5, which was raising this error.

Advice to earlier me: check which mypy and verify it's the one from your environment.

[the-matt-morris]

FWIW I ran into the same situation today when using pre-commit and had to add numpy as a dependency in my .pre-commit-config.yaml:

  - repo: https://github.com/pre-commit/mirrors-mypy
    rev: v0.991
    hooks:
      - id: mypy
        additional_dependencies:
          - 'numpy'