This question is not about Pygame, I'm usin Pygame as an example.

While experimenting with Pygame I've noticed that autocomplete is not working for some modules. For example, if I start typing pygame.mixer autocomplete shows MissingModule. While searching for a solution I've found a lot of similar questions for various text editors and modules that have parts written in C. I am using Visual Studio Code, python path is set correctly and my code runs fine. One strange workaround is modifying Pygame's __init__.py What's the right way to enable autocomplete?

I've found a solution, but I would appreciate some explanation from someone more experienced with Python:

import package.module as module

With Pygame mixer it's:

import pygame.mixer as mixer 

But I still don't understand why autocomplete for import.package.module doesn't work, but import.package.module as module does.