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[Solved] 'ImportError: cannot import name 'ParamSpec' from 'typing_extensions' (.../lib/site-packages/'

Problem: Running into the following error when trying to start up a FastAPI app via uvicorn main:app --reload:

ImportError: cannot import name 'ParamSpec' from 'typing_extensions' (.../lib/site-packages/

Solution: Change the installed version of the typing-extensions package to a more recent version such as 4.3.0.

pip install typing-extensions==4.3.0

Note: You can check your current version of this package via the command pip show typing-extensions.

FYI, this solution was done on a Windows machine


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