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

The i in .pyi stands for ‘interface’.

The .pyi extension was first mentioned in this GitHub issue thread where JukkaL says:

I'd probably prefer an extension with just a single dot. It also needs to be something that is not in use (it should not be used by cython, etc.). .pys seems to be used in Windows (or was). Maybe .pyi, where i stands for an interface definition?