Importing opencv and getting numpy.core.multiarray failed to import

Question

Trying to install OpenCV and running into an issue where attempting to import cv2 results in this output -

    RuntimeError: module compiled against API version 9 but this version of numpy is 7

Traceback (most recent call last):
File "<pyshell#4>", line 1, in <module>
import cv2
ImportError: numpy.core.multiarray failed to import

I'm running on Windows 7 x64, Python v 2.7.9 Thanks!

Answer 1

The error is telling you that you have an out of date version of numpy. If you used pip to install things you can simply run pip install numpy -U, or download the appropriate version from their website.