"is" and "=="

[Carl Banks]

Dagur P?ll Ammendrup wrote:
> I was wondering when == should be used and when "is". I like using "is" 
> when comparing strings and stuff but maybe I shouldn't?


Try this at the prompt:

>>> "ab" is "a"+"b"
0


You should use "is" only when explicitly checking if a and b are same
object (that is, same location in memory, and same .id()).  Otherwise,
use ==.


-- 
CARL BANKS