Newbie Question

[Mel Brown]

I am trying to get Python up and running. Among the modules that I know that
I will need are math, cmath, and string.

When I import sys, then print out the included module names, I get that math
and cmath are included but sting is not. When I import math and then try to
compute something simple like sin(3), I am told that the function sin() is
not available.

My question is how to make the modules math, cmath, and string available for
my use.

Any help, please?