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Homebrew fk my opencv up? #7

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rainyear opened this issue Jul 3, 2015 · 0 comments
Open

Homebrew fk my opencv up? #7

rainyear opened this issue Jul 3, 2015 · 0 comments
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@rainyear
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Bug Fix Note OpenCV

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@rainyear
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rainyear commented Jul 3, 2015

电脑里面一直有Python+OpenCV，最近两次不明原因的重启，之后突然发现No module named cv2:

>>> import cv2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named cv2

我的印象里，cv2就是编译好的一个cv2.so，放在Python的sys.path，先查看这个文件是否还在：

sudo find / -name 'cv2.so'
# /usr/local/lib/python2.7/site-packages/cv2.so

再检查是不是系统路径被更改了：

echo $PYTHONPATH
# /usr/local/lib/python2.7/site-packages/:

然后检查Python中的sys.path：

import sys
sys.path

结果发现/usr/local/lib/python2.7/site-packages/路径也在，切换到这里之后，发现cv2.so变成了一个软链接：

cd /usr/local/lib/python2.7/site-packages/
ls -lah
# lrwxr-xr-x   1 rainy  admin    66B  7  3 10:30 cv2.so -> ../../../Cellar/opencv/2.4.11_1/lib/python2.7/site-packages/cv2.so
cd ../../../Cellar/opencv
# no such file or directory: ../../../Cellar/opencv

而/usr/local/Cellar是Homebrew保存下载包的地方，不清楚什么时候我的cv2.so被替换到这里。无奈只能再用Homebrew安装一次opencv：

brew tap homebrew/science
brew tap --repair
brew install opencv

安装完检验一下

>>> import cv2
>>>

暂时没有时间研究清楚到底发生了什么，虽然相对于自己编译OpenCV的痛苦经历，Homebrew安装起来确实省事不少，可是原本安装好的文件被莫名其妙被替换掉，还是很不爽。

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