[Python] Why Python imports cannot be resolved by Pylance in VS Code, if the package is...

I am using Pylance extension in VS Code. Some packages import cannot be resolved by Pylance. I found out that these packages are located in a shared folder and the UNC Path of this folder is in the PYTHONPATH (environment variable).

All the non-UNC Path in the PYTHONPATH are correctly treated by Pylance.

The python code is running correctly.

So I want Pylance to correctly treat the packages in the shared folder.

I tried : from mail import Mail

And I have this in Pylance : Import "mail" could not be resolved Pylance(reportMissingImports) [Ln 16, Col 6]

To check that the UNC Path in PYTHONPATH was the issue, I copied the packages and pasted them in a local folder. Then I added the local folder path in PYTHONPATH and Pylance was able to correctly resolve the imports.

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