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  lt module gt      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

User · Answer

Python3 x User  sudo pip3 install opencv-python

User · Answer

I solve it by running   pip3 install opencv-python

User · Answer

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

User · Answer

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

User · Answer

Try to add the following line in    bashrc   export PYTHONPATH  usr local lib python2 7 site-packages  PYTHONPATH

User · Answer

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  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   Then in Anaconda prompt I ran these  your path to anconda3 Scripts activate base  conda activate --stack your path to anaconda3  I m not sure about is this the easiest way to reactivate anaconda  but this is what worked for me

User · Answer

If want to install opencv in virtual environment   Run command in terminal for getting virtual environment list   conda env list   or  jupyter notebook command is   conda env list   Then update your anaconda   conda update anaconda-navigator conda update navigator-updater   Install opencv in your selected environment path   conda install -c   environment path   opencv   Juypter notebook    conda install --yes --prefix   environment path   opencv

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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

User · Answer

Try this out   sudo ldconfig  sudo nano  etc ld so conf d opencv conf   and add this following line in the opencv conf not in the command window   usr local lib   Then   sudo ldconfig  sudo nano  etc bash bashrc   and add this two lines in the bash bashrc not in the command window  PKG CONFIG PATH  PKG CONFIG PATH  usr local lib pkgconfig        export PKG CONFIG PATH   at last reboot your Pi sudo reboot now  and try import cv2

User · Answer

I solved my issue using the following command     conda install opencv

User · Answer

I have come accross same as this problem i installed cv2 by  pip install cv2   However when i import cv2 module it displayed no module named cv2 error  Then i searched and find cv2 pyd files in my computer and i copy and paste to site-packages directory   C  Python27 Lib site-packages   then i closed and reopened existing application  it worked   EDIT I will tell how to install cv2 correctly   1  Firstly install numpy on your computer by  pip install numpy    2  Download opencv from internet  almost 266 mb    I download opencv-2 4 12 exe for python 2 7  Then install this opencv-2 4 12 exe file   I extracted to C  Users harun Downloads to this folder  After installation go look for cv2 py into the folders For me  C  Users harun Downloads opencv build python 2 7 x64   in this folder take thecv2 pyd and copy it in to the  C  Python27 Lib site-packages   now you can able to use cv2 in you python scripts

User · Answer

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

User · Answer

I solved my issue using the following command    pip install opencv-python

User · Answer

None of the above answers worked for me  I was going crazy until I found this solution below   Simply run   sudo apt install python-opencv

User · Answer

pip install opencv-python  or pip install opencv-python3   will definately works fine

User · Answer

I solve this by run code pip install opencv contrib python

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IF YOU ARE BUILDING FROM SCRATCH  GO THROUGH THIS  You get No module named cv2 cv  Son  you did all step right  since your sudo make install gave no errors   However look at this step    cd    virtualenvs cv lib python2 7 site-packages    ln -s  usr local lib python2 7 site-packages cv2 so cv2 so   THE VERY IMPORTANT STEP OF ALL THESE IS TO LINK IT   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   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       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     My step will only help  if your built is done right

User · Answer

For Windows 10 and Python 3 6  this worked for me  pip install opencv-contrib-python

[python] Cannot find module cv2 when using OpenCV

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