python 'is not' operator

Question

I notice there is a comparison operator is not. Should I literally translate it into

!= 

instead of

== not
<         


        

Answer 1

python 2.7.3 documentation, 5.9. Comparisons:

The operators <, >, ==, >=, <=, and != compare the values of two objects.

and about operator is in the same chapter:

The operators is and is not test for object identity: x is y is true if and only if x and y are the same object. x is not y yields the inverse truth value.