Mypy does not find lone module .pyi stubs in site-packages #16987
Description
Bug Report
Mypy does not seem to resolve modules that consist of single-file .pyi files that sit directly in site-packages.
For example, the project pyodbc compiles to a single compiled module file, and its accompanying stub file sits with it in site-packages. However, mypy does not recognize this lone .pyi file and instead throws 'Cannot find implementation or library stub for module named "pyodbc" [import-not-found]'.
To Reproduce
python -m venv .venv
source .venv/bin/activate
pip install mypy==1.8.0 pyodbc==5.1.0
mypy -c 'import pyodbc'Expected Behavior
I expect mypy to recognize the module in the same way Python does.
Actual Behavior
<string>:1: error: Cannot find implementation or library stub for module named "pyodbc" [import-not-found]
<string>:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
Found 1 error in 1 file (checked 1 source file)
Your Environment
- Mypy version used: 1.8.0
- Mypy command-line flags: none
- Mypy configuration options from
mypy.ini(and other config files): none - Python version used: 3.10.12
$ ls .venv/lib/python3.10/site-packages
_distutils_hack mypy_extensions-1.0.0.dist-info __pycache__ tomli distutils-precedence.pth typing_extensions.py
mypy pip pyodbc-5.1.0.dist-info tomli-2.0.1.dist-info mypy_extensions.py
mypy-1.8.0.dist-info pip-23.0.1.dist-info setuptools typing_extensions-4.10.0.dist-info pyodbc.cpython-310-x86_64-linux-gnu.so
mypyc pkg_resources setuptools-65.5.0.dist-info 6c7190bc8b55ffe67f57__mypyc.cpython-310-x86_64-linux-gnu.so pyodbc.pyi