ImportError: dynamic module does not define module export function (PyInit_cv2)

Question

When I try to import cv2 in IPython , I am getting this error-

ImportError: dynamic module does not define module export function (PyInit_cv2)

Answer 1

In my case, I was using opencv library for python2 in python3.

Check your PYTHONPATH by typing

echo $PYTHONPATH

and see there is correct path for python3.

$ echo $PYTHONPATH
:/usr/local/lib/python3.4/site-packages

I define PYTHONPATH at the end of ~/.bashrc file. Modify it if you are loading python2's library.

After source ~/.bashrc or restart terminal, check PYTHONPATH again

It solves my problem.