What does 'is' do?

[Robert Brewer]

Derek Fountain wrote:
> I recently saw a use of 'is' in a piece of Python code. I was 
> trying to find
> out what it does. I can't find it in the online docs. I have 
> the "Python in
> a Nutshell" book and that mentions it as a keyword, but I can't find a
> description of it in there either. It's not in the index.
> 
> Can someone tell me where to look?

It's mentioned briefly in both the Library Reference:

http://docs.python.org/lib/comparisons.html

and in the Language Reference:

http://docs.python.org/ref/comparisons.html

...you really should read:

http://www.python.org/doc/current/ref/objects.html

Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org