[pygame] Checking For Pygame

[Kris Schnee <kschnee@xxxxxxxxxx>]

How can I find out whether Pygame is currently loaded? I'd like to use a 
function that requires Pygame to draw something, without loading the 
module in the program unless that function runs?

Right now the function itself says "import pygame," but I'd like to 
account for the possibility that pygame will already be loaded when the 
file it's a part of is incorporated into a bigger project.

Kris