Cannot find module cv2 when using OpenCV

Question

I have installed OpenCV on the Occidentalis operating system (a variant of Raspbian) on a Raspberry Pi, using jayrambhia's script found here. It installed version 2.4.5.

When I try import cv2 in a Python program, I get the following message:

pi@raspberrypi~$ python cam.py Traceback (most recent call last) File "cam.py", line 1, in <module>     import cv2 ImportError: No module named cv2 

The file cv2.so is stored in /usr/local/lib/python2.7/site-packages/...

There are also folders in /usr/local/lib called python3.2 and python2.6, which could be a problem but I'm not sure.

Is this a path error perhaps? Any help is appreciated, I am new to Linux.

Answer 1

First do run these commands inside Terminal/CMD:

conda update anaconda-navigator   conda update navigator-updater   

Then the issue for the instruction below will be resolved

For windows if you have anaconda installed, you can simply do

pip install opencv-python 

or

conda install -c https://conda.binstar.org/menpo opencv 

if you are on linux you can do :

pip install opencv-python 

or

conda install opencv  

Link1 Link2

For python3.5+ check these links : Link3 , Link4

Update:
if you use anaconda, you may simply use this as well (and hence don't need to add menpo channel):

conda install -c conda-forge opencv 

Answer 2

This happens when python cannot refer to your default site-packages folder where you have kept the required python files or libraries

Add these lines in the code:

import sys  sys.path.append('/usr/local/lib/python2.7/site-packages') 

or before running the python command in bash move to /usr/local/lib/python2.7/site-packages directory. This is a work around if you don't want to add any thing to the code.