no module named error

[Joe]

I am trying to write/run a python script which imports from another
script which is located in my /usr/lib64/python2.6/site-packages/ dir,
but getting the following error.

$ python ./mytest.py
Traceback (most recent call last):
  File "./mytest.py", line 45, in <module>
      from moda import *
        File "/usr/lib64/python2.6/site-packages/moda.py", line 7, in
<module>
            import _moda
            ImportError: No module named _moda


The script moda.py exists. My script is:

#!/usr/bin/python

import sys

from moda import *

def main(args = sys.argv[1:]):
    print 'test'

if __name__ == '__main__' :
    main()

Any idea what I'm doing wrong?