RuntimeError module compiled against API version a but this version of numpy is 9

Question

Code   import numpy as np import cv   Console    gt  gt  gt  runfile   Users isaiahnields  spyder2 temp py   wdir   Users isaiahnields  spyder2   RuntimeError  module compiled against API version a but this version of numpy is 9 Traceback  most recent call last    File   lt stdin gt    line 1  in  lt module gt  File   Applications Spyder-Py2 app Contents Resources lib python2 7 spyderlib widgets externalshell sitecustomize py   line 685  in runfile execfile filename  namespace  File   Applications Spyder-Py2 app Contents Resources lib python2 7 spyderlib widgets externalshell sitecustomize py   line 78  in execfile builtins execfile filename   where  File   Users isaiahnields  spyder2 temp py   line 9  in  lt module gt  import cv File   Applications Spyder-Py2 app Contents Resources lib python2 7 cv py   line 1  in  lt module gt  from cv2 cv import   ImportError  numpy core multiarray failed to import  gt  gt  gt     System Info  OS X El Capitan  Macbook Air  1 3 GHz Intel Core i5  8 GB 1600 HMz DDR3  I have already attempted updating numpy  I had to add cv py to the python2 7 folder in Spyder-Py2 is there something else I need to add

User · Answer

I had the same error when trying to launch spyder. "RuntimeError: module compiled against API version 0xb but this version of numpy is 0xa". This error appeared once I modified the numpy version of my machine by mistake (I thought I was in a venv). If your are using spyder installed with conda, my advice is to only use conda to manage package.

This works for me:

conda install anaconda

(I had conda but no anaconda on my machine) then:

conda update numpy

User · Answer

The below command worked for me    conda install -c anaconda numpy

User · Answer

You may also want to check your  PYTHONPATH  I had changed mine in    bashrc in order to get another package to work   To check your path       echo  PYTHONPATH   To change your path  I use nano but you could edit another way       nano    bashrc   Look for the line with export PYTHONPATH      After making changes  don t forget to     source    bashrc

User · Answer

This works for me   My pip is not work after upgrade  so the first thing I need to do is to fix it with  sudo gedit  usr bin pip   Change the line  from pip import main   to  from pip  internal import main   Then     sudo pip install -U numpy

User · Answer

This worked for me   sudo pip install numpy --upgrade --ignore-installed

User · Answer

Check the path  import numpy print numpy   path     For me this was  System Library Frameworks Python framework Versions 2 7 Extras lib python numpy So I moved it to a temporary place  sudo mv  System Library Frameworks Python framework Versions 2 7 Extras lib python numpy    System Library Frameworks Python framework Versions 2 7 Extras lib python numpy old   and then the next time I imported numpy the path was  Library Python 2 7 site-packages numpy init pyc and all was well

User · Answer

I got the same issue with quaternion module  When updating modules with conda  the numpy version is not up dated to the last one  If forcing update with pip command pip install --upgrade numpy   install quaternion module by pip install --user numpy numpy-quaternion  the issue is fixed  May be the issue is coming from the numpy version  Here the execution result   Python 2 7 14  Anaconda custom  64-bit    default  Oct 15 2017  03 34 40   MSC v 1500 64 bit  AMD64   on win32 Type  help    copyright    credits  or  license  for more information    gt  gt  gt  import numpy as np  gt  gt  gt  print np   version   1 14 3  gt  gt  gt    base  C  Users jc gt pip install --user numpy numpy-quaternion Requirement already satisfied  numpy in d  programdata anaconda2 lib site-packages  1 14 3  Collecting numpy-quaternion   Downloading https   files pythonhosted org packages 3e 73 5720d1d0a95bc2d4af2f7326280172bd255db2e8e56f6fbe81933aa00006 numpy quaternion-2018 5 10 13 50 12-cp27-cp27m-win amd64 whl  49kB      100                                     51kB 581kB s Installing collected packages  numpy-quaternion Successfully installed numpy-quaternion-2018 5 10 13 50 12   base  C  Users jc gt python Python 2 7 14  Anaconda custom  64-bit    default  Oct 15 2017  03 34 40   MSC v 1500 64 bit  AMD64   on win32 Type  help    copyright    credits  or  license  for more information    gt  gt  gt  import numpy as np  gt  gt  gt  import quaternion  gt  gt  gt

User · Answer

upgrade numpy to the latest version  pip install numpy --upgrade

User · Answer

I faced the same problem due to documentation inconsistencies  This page says the examples in the docs work best with python 3 x   https   opencv-python-tutroals readthedocs io en latest py tutorials py setup py intro py intro html intro   whereas this installation page has links to python 2 7   and older versions of numpy and matplotlib  https   opencv-python-tutroals readthedocs io en latest py tutorials py setup py setup in windows py setup in windows html  My setup was as such  I already had Python 3 6 and 3 5 installed  but since OpenCv-python docs said it works best with 2 7 x  I also installed that version  After I installed numpy  in Python27 directory  without pip but with the default extractor  since pip is not part of the default python 2 7 installation like it is in 3 6   I ran in this RuntimeError  module compiled against API version a but this version of numpy is error  I tried many different versions of both numpy and opencv  but to no avail  Lastly  I simply deleted numpy from python27  just delete the folder in site-packages as well as any other remaining numpy-named files   and installed the latest versions of numpy  matplotlib  and opencv in the Python3 6 version using pip no problem  Been running opencv ever since   Hope this saves somebody some time

User · Answer

I ran into the same issue tonight  It turned out to be a problem where I had multiple numpy packages installed  An older version was installed in  usr lib python2 7 and the correct version was installed in  usr local lib python2 7   Additionally  I had PYTHONPATH  usr lib python2 7 dist-packages  usr local lib python2 7 dist-packages  PYTHONPATH was finding the older version of numpy before the correct version  so when inside the Python interpreter  it would import the older version of numpy   One thing which helped was opening a python session an executing the following code   import numpy as np  print np   version    print np   path     That should tell you exactly which version Python is using  and where it s installed    To fix the issue  I changed PYTHONPATH  usr local lib python2 7 dist-packages  usr lib python2 7 dist-packages  And I also setup a virtual Python environment using the Hitchiker s Guide to Python  specifically the section titled  Lower level  virtualenv    I know I should have setup a virtual environment in the first place  but I was tired and being lazy  Oh well  lesson learned    Update   Just in case the docs are moved again  here are the relevant bits on     Creating a Python Virtual Environment  Install virtualenv via pip     install virtualenv   Test the installation     virtualenv --version   Optionally  et the environment variable VIRTUALENVWRAPPER PYTHON to change the default version of python used by virtual environments  for example to use Python 3     export VIRTUALENVWRAPPER PYTHON   which python3    Optionally  set the environment variable WORKON HOME to change the default directory your Python virtual environments are created in  for example to use  opt python envs     export WORKON HOME  opt python envs   Create a virtual environment for a project     cd my project folder   virtualenv my virtual env name   Activate the virtual environment  you just created   Assuming you also set WORKON HOME  opt python envs     source  WORKON HOME my virtual env name bin activate   Install whatever Python packages your project requires  using either of the following two methods     Method 1 - Install using pip from command line     pip install python package name1   pip install python package name2   Method 2 - Install using a requests txt file     echo  python package name1   gt  gt  requests txt   echo  python package name2   gt  gt  requests txt   pip install -r   requests txt   Optionally  but highly recommended  install virtualenvwrapper  It contains useful commands to make working with virtual Python environments easier     pip install virtualenvwrapper   source  usr local bin virtualenvwrapper sh   On Windows  install virtualenvwrapper using     pip install virtualenvwrapper-win   Basic usage of virtualenvwrapper Create a new virtual environment     mkvirtualenv my virtual env name   List all virtual environments     lsvirtualenv   Activate a virtual environment     workon my virtual env name   Delete a virtual environment  caution  this is irreversible       rmvirtualenv my virtual env name   I hope this help

User · Answer

This command solved my problem   pip3 install --upgrade numpy

User · Answer

You might want to check your matplotlib version      Somehow I installed a dev version of matplotlib which caused the issue  A downgrade to stable release fixed it    One can also can try python -v -c  import YOUR PACKAGE  2 gt  amp 1   less to see where the issue occurred and if the lines above error can give you some hints

User · Answer

For those using anaconda Python   conda update anaconda

User · Answer

You are likely running the Mac default   usr bin python  which has an older version of numpy installed in the system folders  The easiest way to get python working with opencv is to use brew to install both python and opencv into  usr local and run the  usr local bin python   brew install python brew tap homebrew science brew install opencv

User · Answer

To solve the problem do following   First uninstall numpy  sudo pip uninstall numpy   Install numpy with --no-cache-dir option  sudo pip install --no-cache-dir numpy   And to specify any specific version e g  1 14 2  sudo pip install --no-cache-dir numpy  1 14 2

[python] RuntimeError: module compiled against API version a but this version of numpy is 9

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