Recalling import in module

Question

I'm still learning python and after playing around with pygame I noticed I'm re-importing things in modules I'm importing that I've already imported.

import pygame

For instance I have some classes in a separate file, but I must also import pygame into that file too for them to work. Does it actually import the code twice? Will it slow down my program? Or does it just pull the same import from cache, but if it does that, why would I need to import it again?

Is there anything like (load) in lisp that just pulls in the code like it is part of the main file?

Thank You

Answer 1

Subsequent imports pull the cached module reference from sys.modules. You need to import in order to add the module to the current namespace/scope.