What does “i” represent in Python .pyi extension?

Question

In Python, what does \"i\" represent in .pyi extension?

In PEP-484, it mentions .pyi is \"a stub file\" but no mnemonic help on the extension. So does the \"i\" mea

Answer 1

Apparently PyCharm creates .pyi file for its own purposes:

The *.pyi files are used by PyCharm and other development tools to provide more information, such as PEP 484 type hints, than it is able to glean from introspection of extension types and methods. They are not intended to be imported, executed or used for any other purpose other than providing info to the tools. If you don't use use a tool that makes use of .pyi files then you can safely ignore this file.

See: https://www.python.org/dev/peps/pep-0484/ https://www.jetbrains.com/help/pycharm/2016.1/type-hinting-in-pycharm.html

This comment was found in: python27/Lib/site-packages/wx/core.pyi