Difference between import in script and from interpreter

[Edward Diener]

In a python script a:

from xxx.yyy.zzz import aaa

fails with the message:

"ImportError: No module named xxx.yyy.zzz"

but from within the python interpreter the same line succeeds. What 
would be the causes of that ?

 From within the python interpreter I have looked at sys.path and 
xxx.yyy.zzz is definitely in the path ( off of site-packages ). So I am 
not sure why this is failing within the python script.