need help for pyMPI

[BELFERKOUS_Hadel <hadel.belferkous@cea.fr>]

please, i have a problem to use the pyMPI package,
i think i instal it correctly but it tel me the messanger error like this

~> python
Python 2.3.3 (#1, Feb  5 2005, 16:51:00)
[GCC 3.3.3 (SuSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>> import pyMPI
Traceback (most recent call last):
 File "<stdin>", line 1, in ?
ImportError: No module named pyMPI
>>>
>>> import mpi
Traceback (most recent call last):
 File "<stdin>", line 1, in ?
ImportError: No module named mpi
>>>
>>>
can you help me  ( i work with linux platform)