blocks|key|1642740|text|尝试在~/.bashrc中添加以下行|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1642741|export+PYTHONPATH=/usr/local/lib/python2.7/site-packages:$PYTHONPATH|code-block|syntax|javascript|1642742|entityMap^0|3|9|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Try to add the following line in <code>~/.bashrc</code> 

<pre><code>export PYTHONPATH=/usr/local/lib/python2.7/site-packages:$PYTHONPATH
</code></pre>

blocks|key|1642758|text|当python无法引用保存所需python文件或库的默认站点包文件夹时，就会发生这种情况|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1642759|在代码中添加以下行：|1642760|import+sys

sys.path.append('/usr/local/lib/python2.7/site-packages')|code-block|syntax|javascript|1642761|或者在运行bash中的python命令之前，转到/usr/local/lib/python2.7/site-packages目录。如果你不想在代码中添加任何东西，这是一种变通方法。|1642762|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

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:

<pre><code>import sys

sys.path.append('/usr/local/lib/python2.7/site-packages')
</code></pre>

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.

blocks|key|3754066|text|我使用以下命令解决了我的问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3754067|conda+install+opencv|code-block|syntax|javascript|3754068|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I solved my issue using the following command : 

<pre><code>conda install opencv
</code></pre>

blocks|key|1642792|text|我遇到了与我安装cv2时遇到的问题相同的问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1642793|pip+install+cv2|code-block|syntax|javascript|1642794|但是，当我导入cv2模块时，它没有显示名为cv2的模块错误。|1642795|然后，我在计算机中搜索并找到cv2.pyd文件，然后复制并粘贴到站点包目录中|offset|length|style|CODE|1642796|C:\Python27\Lib\site-packages|1642797|然后我关闭并重新打开现有的应用程序，它起作用了。|1642798|编辑我将告诉你如何正确安装cv2。|BOLD|1642799|numpy+1.首先通过以下步骤在计算机上安装numpy|1642800|pip+install+numpy|1642801|2.从互联网下载opencv+(大约266MB)。|1642802|我下载了Python2.7的opencv-2.4.12.exe。然后安装opencv-2.4.12.exe文件。|1642803|我解压到C:\Users\harun\Downloads到这个文件夹。|1642804|安装后，在文件夹中查找cv2.py。|1642805|对我来说|1642806|C:\Users\harun\Downloads\opencv\build\python\2.7\x64|1642807|在此文件夹中，获取cv2.pyd并将其复制到|1642808|1642809|现在您可以在python脚本中使用cv2了。|1642810|entityMap|0|LINK|mutability|MUTABLE|url|https://sourceforge.net/projects/opencvlibrary/files/opencv-win/^0|0|0|0|E|7|0|0|0|0|2|D|3|0|0|0|0|2|8|6|0|0|E|H|0|4|O|0|B|6|0|0|0|9|7|0|0|H|3|0^^$0|@$1|2|3|4|5|6|7|1O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|1R|8|@$K|1S|L|1T|M|N]]|9|@]|A|$]]|$1|O|3|P|5|D|7|1U|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|1V|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1W|8|@$K|1X|L|1Y|M|U]|$K|1Z|L|20|M|N]]|9|@]|A|$]]|$1|V|3|W|5|6|7|21|8|@]|9|@]|A|$]]|$1|X|3|Y|5|D|7|22|8|@]|9|@]|A|$E|F]]|$1|Z|3|10|5|6|7|23|8|@$K|24|L|25|M|U]]|9|@$K|26|L|27|1|28]]|A|$]]|$1|11|3|12|5|6|7|29|8|@$K|2A|L|2B|M|N]]|9|@]|A|$]]|$1|13|3|14|5|6|7|2C|8|@$K|2D|L|2E|M|N]]|9|@]|A|$]]|$1|15|3|16|5|6|7|2F|8|@$K|2G|L|2H|M|N]]|9|@]|A|$]]|$1|17|3|18|5|6|7|2I|8|@]|9|@]|A|$]]|$1|19|3|1A|5|D|7|2J|8|@]|9|@]|A|$E|F]]|$1|1B|3|1C|5|6|7|2K|8|@$K|2L|L|2M|M|N]]|9|@]|A|$]]|$1|1D|3|P|5|D|7|2N|8|@]|9|@]|A|$E|F]]|$1|1E|3|1F|5|6|7|2O|8|@$K|2P|L|2Q|M|N]]|9|@]|A|$]]|$1|1G|3|-4|5|6|7|2R|8|@]|9|@]|A|$]]]|1H|$1I|$5|1J|1K|1L|A|$1M|1N]]]]

I have come accross same as this problem i installed cv2 by

<pre><code>pip install cv2
</code></pre>

However when i import cv2 module it displayed no module named cv2 error.
 Then i searched and find <code>cv2.pyd</code> files in my computer and i copy and paste to site-packages directory
 

<pre><code>C:\Python27\Lib\site-packages
</code></pre>

then i closed and reopened existing application, it worked.

EDIT
I will tell how to install <code>cv2</code> correctly.

1. Firstly install numpy on your computer by 

<pre><code>pip install numpy
</code></pre>

 
2. Download <a href="https://sourceforge.net/projects/opencvlibrary/files/opencv-win/" rel="noreferrer">opencv</a> from internet (almost 266 mb).
 I download <code>opencv-2.4.12.exe</code> for python 2.7. Then install this opencv-2.4.12.exe file. 
I extracted to <code>C:\Users\harun\Downloads</code> to this folder. 
After installation go look for <code>cv2.py</code> into the folders. For me

<pre><code>C:\Users\harun\Downloads\opencv\build\python\2.7\x64
</code></pre>

in this folder take the<code>cv2.pyd</code> and copy it in to the

<pre><code>C:\Python27\Lib\site-packages
</code></pre>

now you can able to use <code>cv2</code> in you python scripts.

blocks|key|1445079|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1445080|sudo+ldconfig

sudo+nano+/etc/ld.so.conf.d/opencv.conf|code-block|syntax|javascript|1445081|并将以下行添加到opencv.conf中，而不是命令窗口中|offset|length|style|CODE|1445082|/usr/local/lib|1445083|然后：|1445084|sudo+ldconfig

sudo+nano+/etc/bash.bashrc|1445085|并将这两行添加到bash.bashrc中，而不是命令窗口中|1445086|PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig+++++++
export+PKG_CONFIG_PATH|1445087|最后重新启动您的Pi+sudo+reboot+now|1445088|并尝试import+cv2|1445089|entityMap^0|0|0|8|B|0|0|0|0|8|B|0|0|B|F|0|3|A|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@$I|15|J|16|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1A|8|@$I|1B|J|1C|K|L]]|9|@]|A|$]]|$1|U|3|V|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|W|3|X|5|6|7|1E|8|@$I|1F|J|1G|K|L]]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1H|8|@$I|1I|J|1J|K|L]]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]]|11|$]]

Try this out:

<pre><code>sudo ldconfig

sudo nano /etc/ld.so.conf.d/opencv.conf
</code></pre>

and add this following line in the <code>opencv.conf</code> not in the command window

<pre><code>/usr/local/lib
</code></pre>

Then:

<pre><code>sudo ldconfig

sudo nano /etc/bash.bashrc
</code></pre>

and add this two lines in the <code>bash.bashrc</code> not in the command window

<pre><code>PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig 
export PKG_CONFIG_PATH
</code></pre>

at last reboot your Pi <code>sudo reboot now</code>

and try <code>import cv2</code>

blocks|key|1445109|text|我也遇到了同样的问题，只是在/opt/opencv和opencv3中分别安装了opencv2和opencv3时，我无法解决这个问题。原来，opencv在我的主目录中的该死的anaconda安装是路径上的第一个，并且损坏了opencv。删除它并开始使用/etc/ld.so.conf.d/opencv.conf中定义的/opt/opencv3/lib。第一步就是完美的工作。你安装anaconda了吗？可能是问题所在。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1445110|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same problem, just couldn't figure it out with opencv2 and opencv3 installed into /opt/opencv and opencv3 respectively. Turned out that bloody anaconda install of opencv in my home directory was first on path and mangled opencv. Removed it and started using /opt/opencv3/lib as defined in /etc/ld.so.conf.d/opencv.conf. Worked perfectly first go. Do you have anaconda installed? Could be the issue.

blocks|key|1445140|text|首先，在Terminal/CMD中运行以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1445141|conda+update+anaconda-navigator++
conda+update+navigator-updater++|code-block|syntax|javascript|1445142|然后，以下指令的问题将得到解决|1445143|对于windows，如果您安装了anaconda，您可以简单地执行以下操作|1445144|pip+install+opencv-python|1445145|或|1445146|conda+install+-c+https://conda.binstar.org/menpo+opencv|1445147|如果您使用的是linux，则可以执行以下操作：|1445148|pip+install+opencv-python|1445149|1445150|conda+install+opencv+|1445151|Link1+Link2|offset|length|1445152|对于python3.5%2B，请查看以下链接：Link3、Link4|1445153|更新：|1445154|如果你使用anaconda，你也可以简单地使用它(因此不需要添加menpo通道)：|1445155|conda+install+-c+conda-forge+opencv|1445156|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/40872683/unable-to-install-cv2-on-windows#comment68960647_40872683|1|https://stackoverflow.com/questions/19876079/opencv-cannot-find-module-cv2/41895783#comment69457795_35546806|2|https://stackoverflow.com/a/42540015/2736559|3|https://stackoverflow.com/a/30686903/2736559^0|0|0|0|0|0|0|0|0|0|0|0|0|5|0|6|5|1|0|L|5|2|R|5|3|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1O|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1P|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|1R|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|1S|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|1T|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|1U|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1V|8|@]|9|@]|A|$E|F]]|$1|U|3|N|5|6|7|1W|8|@]|9|@]|A|$]]|$1|V|3|W|5|D|7|1X|8|@]|9|@]|A|$E|F]]|$1|X|3|Y|5|6|7|1Y|8|@]|9|@$Z|1Z|10|20|1|21]|$Z|22|10|23|1|24]]|A|$]]|$1|11|3|12|5|6|7|25|8|@]|9|@$Z|26|10|27|1|28]|$Z|29|10|2A|1|2B]]|A|$]]|$1|13|3|14|5|6|7|2C|8|@]|9|@]|A|$]]|$1|15|3|16|5|6|7|2D|8|@]|9|@]|A|$]]|$1|17|3|18|5|D|7|2E|8|@]|9|@]|A|$E|F]]|$1|19|3|-4|5|6|7|2F|8|@]|9|@]|A|$]]]|1A|$1B|$5|1C|1D|1E|A|$1F|1G]]|1H|$5|1C|1D|1E|A|$1F|1I]]|1J|$5|1C|1D|1E|A|$1F|1K]]|1L|$5|1C|1D|1E|A|$1F|1M]]]]

First do run these commands inside Terminal/CMD:
<pre><code>conda update anaconda-navigator 
conda update navigator-updater 
</code></pre>
Then the issue for the instruction below will be resolved
For windows if you have anaconda installed, you can simply do
<pre><code>pip install opencv-python
</code></pre>
or
<pre><code>conda install -c https://conda.binstar.org/menpo opencv
</code></pre>
if you are on linux you can do :
<pre><code>pip install opencv-python
</code></pre>
or
<pre><code>conda install opencv 
</code></pre>
<a href="https://stackoverflow.com/questions/40872683/unable-to-install-cv2-on-windows#comment68960647_40872683">Link1</a> <a href="https://stackoverflow.com/questions/19876079/opencv-cannot-find-module-cv2/41895783#comment69457795_35546806">Link2</a>
For python3.5+ check these links : <a href="https://stackoverflow.com/a/42540015/2736559">Link3</a> , <a href="https://stackoverflow.com/a/30686903/2736559">Link4</a>
Update: 
if you use anaconda, you may simply use this as well (and hence don't need to add menpo channel):
<pre><code>conda install -c conda-forge opencv
</code></pre>

blocks|key|1642914|text|上面的答案对我来说都不起作用。我都快疯了，直到我找到了下面的解决方案！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1642915|只需运行：|1642916|sudo+apt+install+python-opencv|code-block|syntax|javascript|1642917|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

None of the above answers worked for me. I was going crazy until I found this solution below!

Simply run:

<pre><code>sudo apt install python-opencv
</code></pre>

blocks|key|1642955|text|如果想在虚拟环境中安装opencv。在终端中运行获取虚拟环境列表的命令。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1642956|conda+env+list|code-block|syntax|javascript|1642957|或者jupyter+notebook命令是|1642958|!conda+env+list|1642959|然后更新您的蟒蛇。|1642960|conda+update+anaconda-navigator
conda+update+navigator-updater|1642961|在选定的环境路径中安装opencv。|1642962|conda+install+-c+['environment+path']+opencv|1642963|Juypter+notebook|1642964|!conda+install+--yes+--prefix+['environment+path']+opencv|1642965|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|V|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

If want to install opencv in virtual environment. 
Run command in terminal for getting virtual environment list.

<pre><code>conda env list
</code></pre>

or 
jupyter notebook command is

<pre><code>!conda env list
</code></pre>

Then update your anaconda.

<pre><code>conda update anaconda-navigator
conda update navigator-updater
</code></pre>

Install opencv in your selected environment path.

<pre><code>conda install -c ['environment path'] opencv
</code></pre>

Juypter notebook 

<pre><code>!conda install --yes --prefix ['environment path'] opencv
</code></pre>

blocks|key|1642978|text|Python3.x用户|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1642979|sudo+pip3+install+opencv-python|code-block|syntax|javascript|1642980|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Python3.x User

<pre><code>sudo pip3 install opencv-python
</code></pre>

blocks|key|5172462|text|如果您是从头开始构建，请通过此|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|5172463|你得到了No+module+named+cv2.cv。儿子，你做的每一步都是对的，因为你的sudo+make+install没有给出错误。|CODE|5172464|然而，看看这一步|5172465|$+cd+~/.virtualenvs/cv/lib/python2.7/site-packages/
$+ln+-s+/usr/local/lib/python2.7/site-packages/cv2.so+cv2.so|code-block|syntax|javascript|5172466|所有这些中非常重要的一步是链接IT。|5172467|ln+-s+/usr/local/lib/python2.7/site-packages/cv2.so+cv2.so+
or+
ln+-s+/usr/local/lib/python2.7/dist-packages/cv2.so+cv2.so|5172468|在选择明智链接的瞬间，或者通过暴力破解，只要cv2.so文件存在或不存在的话|5172469|这里我抛出了我的输出。|5172470|++++Successfully+installed+numpy-1.15.3
(cv)+demonLover-desktop:~$+cd+~/.virtualenvs/cv/lib/python2.7/site-packages/
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ln+-s+/usr/local/lib/python2.7/site-packages/cv2.so+cv2.so
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+pip+list
Package++++Version
----------+-------
numpy++++++1.15.3+
pip++++++++18.1+++
setuptools+40.5.0+
wheel++++++0.32.2+
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+python
Python+2.7.12+(default,+Dec++4+2017,+14:50:18)+
[GCC+5.4.0+20160609]+on+linux2
Type+"help",+"copyright",+"credits"+or+"license"+for+more+information.
>>>+import+cv2
Traceback+(most+recent+call+last):
++File+"<stdin>",+line+1,+in+<module>
ImportError:+No+module+named+cv2
>>>+
[2]%2B++Stopped+++++++++++++++++python
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ls+/usr/local/lib/python2.7/site-packages/c
ls:+cannot+access+'/usr/local/lib/python2.7/site-packages/c':+No+such+file+or+directory
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ls+/usr/local/lib/python2.7/site-packages/
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+deactivate+
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ls+/usr/local/lib/python2.7/site-packages/
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ls
cv2.so++easy_install.py++easy_install.pyc++numpy++numpy-1.15.3.dist-info++pip++pip-18.1.dist-info++pkg_resources++setuptools++setuptools-40.5.0.dist-info++wheel++wheel-0.32.2.dist-info
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ls+/usr/local/lib/python2.7/site-packages/
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ls+-l++/usr/local/lib/python2.7/site-packages/
total+0
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ls
cv2.so++easy_install.py++easy_install.pyc++numpy++numpy-1.15.3.dist-info++pip++pip-18.1.dist-info++pkg_resources++setuptools++setuptools-40.5.0.dist-info++wheel++wheel-0.32.2.dist-info
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+workon+cv
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+python
Python+2.7.12+(default,+Dec++4+2017,+14:50:18)+
[GCC+5.4.0+20160609]+on+linux2
Type+"help",+"copyright",+"credits"+or+"license"+for+more+information.
>>>+import+cv2
Traceback+(most+recent+call+last):
++File+"<stdin>",+line+1,+in+<module>
ImportError:+No+module+named+cv2
>>>+
[3]%2B++Stopped+++++++++++++++++python
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+find+/+-name+"cv2.so"
find:+‘/lost%2Bfound’:+Permission+denied
find:+‘/run/udisks2’:+Permission+denied
find:+‘/run/docker’:+Permission+denied
find:+‘/run/exim4’:+Permission+denied
find:+‘/run/lightdm’:+Permission+denied
find:+‘/run/cups/certs’:+Permission+denied
find:+‘/run/sudo’:+Permission+denied
find:+‘/run/samba/ncalrpc/np’:+Permission+denied
find:+‘/run/postgresql/9.5-main.pg_stat_tmp’:+Permission+denied
find:+‘/run/postgresql/10-main.pg_stat_tmp’:+Permission+denied
find:+‘/run/lvm’:+Permission+denied
find:+‘/run/systemd/inaccessible’:+Permission+denied
find:+‘/run/lock/lvm’:+Permission+denied
find:+‘/root’:+Permission+denied
%5EC
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+sudofind+/+-name+"cv2.so"
sudofind:+command+not+found
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+%5EC
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+sudo+find+/+-name+"cv2.so"
[sudo]+password+for+app:+
find:+‘/run/user/1000/gvfs’:+Permission+denied
%5EC
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+sudo+find+/usr/+-name+"cv2.so"
/usr/local/lib/python2.7/dist-packages/cv2.so
%5EC
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ln+-s+/usr/local/lib/python2.7/dist-packages/ccv2.so+cv2.so
click/++++++++++++++++++++++++clonevirtualenv.pyc+++++++++++configparser-3.5.0.dist-info/+configparser.py+++++++++++++++cv2.so++++++++++++++++++++++++cycler.py
clonevirtualenv.py++++++++++++concurrent/+++++++++++++++++++configparser-3.5.0-nspkg.pth++configparser.pyc++++++++++++++cycler-0.10.0.dist-info/++++++cycler.pyc
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ln+-s+/usr/local/lib/python2.7/dist-packages/cv2.so+cv2.so
ln:+failed+to+create+symbolic+link+'cv2.so':+File+exists
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+rm+cv2.so+
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ln+-s+/usr/local/lib/python2.7/dist-packages/cv2.so+cv2.so
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+ls
cv2.so++easy_install.py++easy_install.pyc++numpy++numpy-1.15.3.dist-info++pip++pip-18.1.dist-info++pkg_resources++setuptools++setuptools-40.5.0.dist-info++wheel++wheel-0.32.2.dist-info
(cv)+demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$+python
Python+2.7.12+(default,+Dec++4+2017,+14:50:18)+
[GCC+5.4.0+20160609]+on+linux2
Type+"help",+"copyright",+"credits"+or+"license"+for+more+information.
>>>+import+cv2
>>>+|5172471|我的步骤只会有帮助，如果你的构建是正确的。|5172472|entityMap^0|0|F|0|4|M|19|H|0|0|0|0|I|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|16|8|@$9|17|A|18|B|H]|$9|19|A|1A|B|H]]|D|@]|E|$]]|$1|I|3|J|5|6|7|1B|8|@]|D|@]|E|$]]|$1|K|3|L|5|M|7|1C|8|@]|D|@]|E|$N|O]]|$1|P|3|Q|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|R|3|S|5|M|7|1G|8|@]|D|@]|E|$N|O]]|$1|T|3|U|5|6|7|1H|8|@]|D|@]|E|$]]|$1|V|3|W|5|6|7|1I|8|@]|D|@]|E|$]]|$1|X|3|Y|5|M|7|1J|8|@]|D|@]|E|$N|O]]|$1|Z|3|10|5|6|7|1K|8|@]|D|@]|E|$]]|$1|11|3|-4|5|6|7|1L|8|@]|D|@]|E|$]]]|12|$]]

IF YOU ARE BUILDING FROM SCRATCH, GO THROUGH THIS

You get <code>No module named cv2.cv</code>.
Son, you did all step right, since your <code>sudo make install</code> gave no errors.

However look at this step

<pre><code>$ cd ~/.virtualenvs/cv/lib/python2.7/site-packages/
$ ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.so
</code></pre>

THE VERY IMPORTANT STEP OF ALL THESE IS TO LINK IT.

<pre><code>ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.so 
or 
ln -s /usr/local/lib/python2.7/dist-packages/cv2.so cv2.so
</code></pre>

The moment you choose wise linking, or by brute force just find the cv2.so file if that exist or not

Here I am throwing my output.

<pre><code> Successfully installed numpy-1.15.3
(cv) demonLover-desktop:~$ cd ~/.virtualenvs/cv/lib/python2.7/site-packages/
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.so
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ pip list
Package Version
---------- -------
numpy 1.15.3 
pip 18.1 
setuptools 40.5.0 
wheel 0.32.2 
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ python
Python 2.7.12 (default, Dec 4 2017, 14:50:18) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
&gt;&gt;&gt; import cv2
Traceback (most recent call last):
 File "&lt;stdin&gt;", line 1, in &lt;module&gt;
ImportError: No module named cv2
&gt;&gt;&gt; 
[2]+ Stopped python
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ls /usr/local/lib/python2.7/site-packages/c
ls: cannot access '/usr/local/lib/python2.7/site-packages/c': No such file or directory
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ls /usr/local/lib/python2.7/site-packages/
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ deactivate 
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ls /usr/local/lib/python2.7/site-packages/
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ls
cv2.so easy_install.py easy_install.pyc numpy numpy-1.15.3.dist-info pip pip-18.1.dist-info pkg_resources setuptools setuptools-40.5.0.dist-info wheel wheel-0.32.2.dist-info
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ls /usr/local/lib/python2.7/site-packages/
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ls -l /usr/local/lib/python2.7/site-packages/
total 0
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ls
cv2.so easy_install.py easy_install.pyc numpy numpy-1.15.3.dist-info pip pip-18.1.dist-info pkg_resources setuptools setuptools-40.5.0.dist-info wheel wheel-0.32.2.dist-info
demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ workon cv
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ python
Python 2.7.12 (default, Dec 4 2017, 14:50:18) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
&gt;&gt;&gt; import cv2
Traceback (most recent call last):
 File "&lt;stdin&gt;", line 1, in &lt;module&gt;
ImportError: No module named cv2
&gt;&gt;&gt; 
[3]+ Stopped python
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ find / -name "cv2.so"
find: ‘/lost+found’: Permission denied
find: ‘/run/udisks2’: Permission denied
find: ‘/run/docker’: Permission denied
find: ‘/run/exim4’: Permission denied
find: ‘/run/lightdm’: Permission denied
find: ‘/run/cups/certs’: Permission denied
find: ‘/run/sudo’: Permission denied
find: ‘/run/samba/ncalrpc/np’: Permission denied
find: ‘/run/postgresql/9.5-main.pg_stat_tmp’: Permission denied
find: ‘/run/postgresql/10-main.pg_stat_tmp’: Permission denied
find: ‘/run/lvm’: Permission denied
find: ‘/run/systemd/inaccessible’: Permission denied
find: ‘/run/lock/lvm’: Permission denied
find: ‘/root’: Permission denied
^C
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ sudofind / -name "cv2.so"
sudofind: command not found
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ^C
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ sudo find / -name "cv2.so"
[sudo] password for app: 
find: ‘/run/user/1000/gvfs’: Permission denied
^C
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ sudo find /usr/ -name "cv2.so"
/usr/local/lib/python2.7/dist-packages/cv2.so
^C
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ln -s /usr/local/lib/python2.7/dist-packages/ccv2.so cv2.so
click/ clonevirtualenv.pyc configparser-3.5.0.dist-info/ configparser.py cv2.so cycler.py
clonevirtualenv.py concurrent/ configparser-3.5.0-nspkg.pth configparser.pyc cycler-0.10.0.dist-info/ cycler.pyc
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ln -s /usr/local/lib/python2.7/dist-packages/cv2.so cv2.so
ln: failed to create symbolic link 'cv2.so': File exists
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ rm cv2.so 
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ln -s /usr/local/lib/python2.7/dist-packages/cv2.so cv2.so
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ ls
cv2.so easy_install.py easy_install.pyc numpy numpy-1.15.3.dist-info pip pip-18.1.dist-info pkg_resources setuptools setuptools-40.5.0.dist-info wheel wheel-0.32.2.dist-info
(cv) demonLover-desktop:~/.virtualenvs/cv/lib/python2.7/site-packages$ python
Python 2.7.12 (default, Dec 4 2017, 14:50:18) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
&gt;&gt;&gt; import cv2
&gt;&gt;&gt; 
</code></pre>

My step will only help, if your built is done right.

blocks|key|1643017|text|我使用以下命令解决了我的问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1643018|pip+install+opencv-python|code-block|syntax|javascript|1643019|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I solved my issue using the following command :

<pre><code>pip install opencv-python
</code></pre>

blocks|key|1440981|text|我让opencv安装和工作的另一种方式是在visual+studio+2017社区内部。Visual+studio有一个很好的python调试环境。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1440982|因此，我在vs+python环境窗口中搜索并添加了opencv。我只是想分享一下，因为我喜欢在不同的电脑上尝试不同的方式。|1440983|​|1440984|📷|atomic|offset|length|1440985|1440986|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/4d31597bf3d84d3441b89612023226cc.png|imageAlt^0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@$I|Y|J|Z|1|10]]|A|$]]|$1|K|3|E|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S|T|-4]]]]

Another way I got opencv to install and work was inside visual studio 2017 community.
Visual studio has a nice python environment with debugging. 
So from the vs python env window I searched and added opencv. 
Just thought I would share because I like to try things different ways and on different computers.

<a href="https://i.stack.imgur.com/qxSQA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qxSQA.png" alt="VisualStudio2017 python environments with opencv"></a>

blocks|key|1445242|text|我通过运行代码pip+install+opencv_contrib_python来解决这个问题|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1445243|entityMap^0|7|X|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

I solve this by run code <code>pip install opencv_contrib_python</code>

blocks|key|1440996|text|我通过运行以下命令来解决这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1440997|pip3+install+opencv-python|code-block|syntax|javascript|1440998|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I solve it by running:

<pre><code>pip3 install opencv-python
</code></pre>

blocks|key|1445264|text|对于Windows+10和Python+3.6，这适用于我|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1445265|pip+install+opencv-contrib-python|offset|length|style|CODE|1445266|entityMap^0|0|0|X|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

For Windows 10 and Python 3.6, this worked for me

<code>pip install opencv-contrib-python</code>

blocks|key|1445281|text|我知道你有西方的问题，但我在Windows上也有这个问题，我没有找到任何有用的东西。因此，如果您有windows，并且安装了opencv，但仍然收到导入错误，则此方法可能会解决此问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1445282|我设法解决了这个问题，通过重新激活anaconda。|1445283|首先，我删除了您的\+PATH+\to\anaconda3和您的\PATH\to\anaconda3\Scripts+from+PATH(您稍后会用到这些路径，所以请记住这些路径)|1445284|然后，如果您从cmd运行python，它将显示：|1445285|Warning:
This+Python+interpreter+is+in+a+conda+environment,+but+the+environment+has
not+been+activated.+Libraries+may+fail+to+load.+To+activate+this+environment
please+see+https://conda.io/activation.|code-block|syntax|javascript|1445286|然后，在Anaconda提示符下，我运行了以下命令：|1445287|your\path\to\anconda3\Scripts\activate+base+
conda+activate+--stack+your\path\to\anaconda3|1445288|我不确定这是不是重新激活蟒蛇的最简单的方法，但这是对我有效的方法。|1445289|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|Y|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

I know you had the issue with Occidentalis, but I had the issue on Windows too, and I didn't found anything helpful. So if you have windows, and you've installed opencv, but you still get an Import error, this method will maybe solve the issue.
I managed to solve the issue, by reactivating anaconda.
First I deleted your\path\to\anaconda3 and your\path\to\anaconda3\Scripts from PATH (you will need these later, so remember these paths)
Then if you run python from cmd it will say:
<pre><code>Warning:
This Python interpreter is in a conda environment, but the environment has
not been activated. Libraries may fail to load. To activate this environment
please see https://conda.io/activation.
</code></pre>
Then in Anaconda prompt I ran these:
<pre><code>your\path\to\anconda3\Scripts\activate base 
conda activate --stack your\path\to\anaconda3
</code></pre>
I'm not sure about is this the easiest way to reactivate anaconda, but this is what worked for me.

blocks|key|5172640|text|pip+install+opencv-python|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|5172641|或|unstyled|offset|length|style|BOLD|5172642|pip+install+opencv-python3+|5172643|肯定会工作得很好，|5172644|entityMap^0|0|0|1|0|0|0|9|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@$G|S|H|T|I|J]]|9|@]|A|$]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|M|3|N|5|F|7|V|8|@$G|W|H|X|I|J]]|9|@]|A|$]]|$1|O|3|-4|5|F|7|Y|8|@]|9|@]|A|$]]]|P|$]]

<pre><code>pip install opencv-python
</code></pre>
or
<pre><code>pip install opencv-python3 
</code></pre>
will definately works fine

blocks|key|5172674|text|这是为那些使用ubuntu运行script.py的人准备的，你必须复制cv2到你的python+pachkages目录下，然后给你的bachrc分配资源。这里：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5172675|sudo+cp+-rfv+/home/<user>/<your+opencv+file+dir>/lib/cv2.so++/usr/local/lib/python2.7/site-packages/
export+PYTHONPATH=/usr/local/lib/python2.7/site-packages:$PYTHONPATH|code-block|syntax|javascript|5172676|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is for those who are using ubuntu to run their script.py
you have to copy cv2.so under your python pachkages dir and then resourcing your bachrc.
here:
<pre><code>sudo cp -rfv /home/&lt;user&gt;/&lt;your opencv file dir&gt;/lib/cv2.so /usr/local/lib/python2.7/site-packages/
export PYTHONPATH=/usr/local/lib/python2.7/site-packages:$PYTHONPATH
</code></pre>

blocks|key|5172695|text|这将是您的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5172696|pip+install+opencv-contrib-python|code-block|syntax|javascript|5172697|就像一种护身符……！|5172698|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

It would be your solution :
<pre><code>pip install opencv-contrib-python
</code></pre>
Works like a charm....!

blocks|key|5172713|text|适用于python3x用户|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|5172714|$+sudo+pip3+install+opencv-python|code-block|syntax|javascript|5172715|适用于python2x用户|5172716|$+sudo+pip+install+opencv-python|5172717|entityMap^0|3|8|0|0|3|8|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

For python3x users
<pre><code>$ sudo pip3 install opencv-python
</code></pre>
For python2x users
<pre><code>$ sudo pip install opencv-python
</code></pre>

I have installed <a href="https://en.wikipedia.org/wiki/OpenCV" rel="noreferrer">OpenCV</a> on the Occidentalis operating system (a variant of Raspbian) on a Raspberry Pi, using jayrambhia's script found <a href="https://github.com/jayrambhia/Install-OpenCV/blob/master/Ubuntu/opencv_latest.sh" rel="noreferrer">here</a>. It installed version 2.4.5.

When I try <code>import cv2</code> in a Python program, I get the following message:

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

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

There are also folders in <code>/usr/local/lib</code> 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.

Cannot find module cv2 when using OpenCV

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我已经在Raspberry Pi上的西方操作系统(Raspbian的一个变体)上安装了，使用的是jayrambhia的脚本找到的。它安装了2.4.5版。当我在Python程序中尝试import cv2时，我得到以下消息：pi@raspberrypi~$ python cam.pyTraceback (most rece...

问使用OpenCV时找不到模块cv2
EN

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问使用OpenCV时找不到模块cv2EN