Question

所以我跟着this tutorial并得到了这个错误：

brew link --overwrite eigen
brew install opencv3 --with-python3 --with-contrib

在~/.profile中写了这个并且来源：

export PYTHONPATH=$PYTHONPATH:/usr/local/Cellar/opencv3/3.0.0/lib/python3.4/site-packages
source ~/.profile
python3
Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 00:54:21) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'cv2'

有人可以指导我出了什么问题以及如何解决它？

更新：

我也试过了：

Monas-MacBook-Pro:build mona$ brew ln --force opencv3
Linking /usr/local/Cellar/opencv3/3.1.0_3... 
Error: Could not symlink bin/opencv_annotation
Target /usr/local/bin/opencv_annotation
is a symlink belonging to opencv. You can unlink it:
  brew unlink opencv

To force the link and overwrite all conflicting files:
  brew link --overwrite opencv3

To list all files that would be deleted:
  brew link --overwrite --dry-run opencv3
Monas-MacBook-Pro:build mona$ brew link --overwrite opencv3
Warning: opencv3 is keg-only and must be linked with --force
Note that doing so can interfere with building software.
Monas-MacBook-Pro:build mona$ brew link --force --overwrite opencv3
Linking /usr/local/Cellar/opencv3/3.1.0_3... 551 symlinks created

Answer 1

由于您使用Homebrew安装了OpenCV3，因此您的符号链接可能已损坏。

由于当前版本的Homebrew / science中的OpenCV是3.1.0，你的符号链接可能应该指向

/usr/local/Cellar/opencv3/3.1.0_3/lib/python3.5/site-packages

3.1.0_3和python3.5可能在您的系统上有所不同，所以只需自己查看/ usr / local / Cellar中的目录。

BTW我不需要在做完

后链接任何东西

brew ln --force opencv3

Answer 2

您需要链接您的opencv到python site-packages

使用ln -s [cellar-opencv-site-packages-path] [lib-python-site-packages-path]链接 cv.py 和 cv2.so

ln -s /usr/local/Cellar/opencv3/3.1.0_3/lib/python3.4.1/site-packages/cv.py /usr/local/lib/python3.4.1/site-packages/cv.py

ln -s /usr/local/Cellar/opencv3/3.1.0_3/lib/python3.4.1/site-packages/cv2.so /usr/local/lib/python3.4.1/site-packages/cv2.so

Path将基于opencv和python版本。

这是 - [opencv3/3.1.0_3]和[python3.4.1]

简而言之，从/usr/local/Cellar/opencv3/[[version]]/lib/python[[version]]/site-packages/复制/链接 cv.py 和 cv2.so 到/usr/local/lib/python[[version]]/site-packages/

或者您也可以将opencv site-packages添加到PYTHONPATH

export PYTHONPATH=$PYTHONPATH:/usr/local/Cellar/opencv3/3.1.0_3/lib/python3.4.1/site-packages/

source ~/.profile

在OSX中为python3安装opencv3

2 个答案: