Here's all of the easter eggs in Python that I know of:
>>>import this
-prints the "Zen of Python"
>>>import __hello__ or import __phello__
-prints Hello, World... apparently only works the first time that you import it
>>>import antigravity
-opens the default web browser to display an excellent XKCD comic caveat: only works in Python 3.0 and above
>>>from __future__ import braces
-returns a hilarious error message (if you know BDFL's opinion on curly delimiters in Python)
That's all that I can think of for now. Isn't this nice? Python is such an awesome programming language that it's the only one that has easter eggs!