mypy reports error: Skipping analyzing "fxpmath": module is installed, but missing library stubs or py.typed marker

[jtmoon79]

tl;dr mypy reports error when reviewing a file with import fxpmath:
error: Skipping analyzing "fxpmath": module is installed, but missing library stubs or py.typed marker [import-untyped]

Problem

Running mypy against a Python file that imports fxpmath fails with error

PS> mypy .\testA.py
testA.py:1: error: Skipping analyzing "fxpmath": module is installed, but missing library stubs or py.typed marker  [import-untyped]
testA.py:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports

Reproduction

Using Python 3.8.10

Create a simple Python file testA.py

import fxpmath


if __name__ == "__main__":
    print(str(dir(fxpmath)))

Run mypy against the simple Python file testA.py. Use a virtual environment.

PS> python -m virtualenv --copies .virtualenv
PS> .\.virtualenv\Scripts\activate.ps1
PS> pip install fxpmath mypy
PS> mypy .\testA.py
testA.py:1: error: Skipping analyzing "fxpmath": module is installed, but missing library stubs or py.typed marker  [import-untyped]
testA.py:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports 

This installed fxpmath version 0.4.9, mypy version 1.8.0.

This bug was tested on Windows 10. This bug should occur on every Python platform.

Solution

One of:

• Provide py.typed markers in fxpmath as suggested by mypy
• Provide a types-fxpmath types stub package (similar to, for example, types-setuptools).