[Python] Prevent PyCharm from opening stub files (*.pyi) instead of source files (*.py)

When I ctrl+click a import name in PyCharm, it will often take me to the stub file instead of the source.

For example, following the ssl name in:

import ssl


Will take me to somewhere like:

~/pycharm/helpers/typeshed/stdlib/2and3/ssl.pyi


When I wanted to go instead to:

/usr/local/lib/python3.7/ssl.py


This is an intermittent but frequently reoccurring problem and I'm not sure what triggers it. I don't want to see the typeshed stubs. How can you prevent PyCharm from preferring to open .pyi files instead of source files?

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