Purpose of python antigravity module

It's an easter egg. Here are some more, have fun!

>>> import __hello__
Hello world!

>>> import __phello__
Hello world!

>>> from __future__ import braces
SyntaxError: not a chance

>>> hash(float('inf'))
314159

>>> hash(-1)
-2

>>> from __future__ import barry_as_FLUFL
>>> 1 <> 2
True
>>> 1 != 2
  File "<stdin>", line 1
    1 != 2
      ^^
SyntaxError: with Barry as BDFL, use '<>' instead of '!='

>>> import types
>>> help(types.CodeType)
Help on class code in module builtins:

class code(object)
 |  # ...
 |
 |  Create a code object.  Not for the faint of heart.
 |
# ...

And last but not least, the legendary Zen of Python:

>>> import this
The Zen of Python, by Tim Peters

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!

No, it's just an easter egg. This brief blog post has a bit more detail.