导入错误：dlopen(/usr/local/opt/opencv3/lib/python2.7/site-packages/cv2.so, 2)：找不到符号：_PyCObject_Type

Question

This is how I installed opencv3 on my machine. I had python 3.6 installed in my system. I ran,

$ brew install opencv3 --with-contrib --with-python3 --HEAD

Then changed the name of opencv3 package in the 3.6 site package.

$ cd /usr/local/opt/opencv3/lib/python3.6/site-packages/
$ mv cv2.cpython-35m-darwin.so cv2.so

And then created .pth file.

$ echo /usr/local/opt/opencv3/lib/python3.6/site-packages >> /usr/local/lib/python3.6/site-packages/opencv3.pth

Now when I get on the python 3 REPL and call

import cv2

This is the error that I get.

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dlopen(/usr/local/opt/opencv3/lib/python2.7/site-packages/cv2.so, 2): Symbol not found: _PyCObject_Type
  Referenced from: /usr/local/opt/opencv3/lib/python2.7/site-packages/cv2.so
  Expected in: flat namespace
 in /usr/local/opt/opencv3/lib/python2.7/site-packages/cv2.so

I want my python 3 interpreter to look into the python 3.6 site packages for cv2 and I can't get it to do that. Any help appreciated.

Answer 1

I removed all opencv3 folders and removed the opencv package in python environment and then installed opencv again. It's working for me now.