[Zope] zope, python, and double underscores

hi. can anyone tell me why in the world zope gives me these snide "__init__" is an invalid variable name because it starts with "_" "__repr__" is an invalid variable name because it starts with "_" "__name__" is an invalid variable name because it starts with "_" errors when i try to run a script that works outside of zope. i'm relatively new to zope, and very new to python. nevertheless, i know that i'm using __init__, __name__, and __repr__ correctly. thanks, adam