retrieve / find out an image's dimensions

[Adam Teale]

hey guys

Is there a builtin/standard install method in python for retrieving or
finding out an image's dimensions?

A quick google found me this:
http://www.pythonware.com/library/pil/handbook/introduction.htm

but it looks like it is something I will need to install - I'd like to
be able to pass my script around to people without them needing any
additional modules

Any help would be fantastic!

Cheers

Adam
python 2.3.5
osx 10.4.9