[wxPython] import error can't find module wx

from wxPython.wx import *

i receive the following error:
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "wPython.py", line 1, in ?
    from wxPython.wx import *
ImportError: No module name wx

Recheck 1) PYTHONPATH variable is correctly set to
"/usr/local/lib/python2.2/site-packages"
where wxPython exists in ur current shell.
        2) which python you are running.