ImportError: No module named ‘pygame’

I have installed python 3.3.2 and pygame 1.9.2a0. Whenever I try to import pygame by typing:

import pygame

I get following error message :

Python 3.3.2 (v3.3.2:d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import pygame
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    import pygame
ImportError: No module named 'pygame'
>>> 

I went through some of the questions related to this error but none of the solution helped. I have 64 bit machine with Win7 OS