Elementric(?) import problem?

[Rasmus]

Hi.

Still learning python, I have searched for guides, and found this one:
http://www.cs.lth.se/Education/LU/kurser/dat108/PythonProgramming.pdf

When trying some of the examples like
>>> from Numeric import *
>>> a = array( (1,2,3) )

I get the error:
>>> from Numeric import *
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named Numeric
>>>

I might have some setup problems?
I'm running winXP, please advice me of either where to read, or what to do.

Thanks in advance,

        Rasmus