Python 3 & Anaconda

asked 2015-08-25 06:33:50 -0500

peter_cz gravatar image

updated 2015-09-16 02:36:42 -0500

Dears,

I am starting with OpenCV and building latest OpenCV using MSVC++ 2015, Anacodna 3 (as python distribution). Using CMake for configuring and I am getting

... Found PythonInterp: C:/Anaconda3/python.exe (found suitable version "3.4.3", minimum required is "3.4") Could NOT find PythonLibs: Found unsuitable version "2.7.10+", but required is exact version "3.4.3" (found PYTHON_LIBRARY-NOTFOUND) ....

I have python 2.7.10 as well installed - how to tell CMake for correct config or what to modify or what missing for PythonLibs?

Thank you very much for your help.

Thank you, Best regards

Peter

P.S. comment on 9/16/2015

I'm using Anaconda3 x86 distribution and I did configure OpenCV as

  Python 2:
    Interpreter:                 C:/Anaconda2_x86/python.exe (ver 2.7.10)

  Python 3:
    Interpreter:                 C:/Anaconda3_x86/python.exe (ver 3.4.3)
    Libraries:                   C:/Anaconda3_x86/libs/python34.lib (ver 3.4.3)
    numpy:                       C:/Anaconda3_x86/lib/site-packages/numpy/core/include (ver 1.9.2)
    packages path:               C:/Anaconda3_x86/Lib/site-packages

  Python (for build):            C:/Anaconda2_x86/python.exe

How to tell OpenCV (CMake configuration) to use C:/Anaconda3_x86/python.exe (ver 3.4.3) for build?

Now by compiling for python 3 I got stop saying:

Scanning dependencies of target opencv_python3
[ 76%] Building CXX object modules/python3/CMakeFiles/opencv_python3.dir/__/src2/cv2.cpp.obj
In file included from C:/Anaconda3_x86/include/Python.h:8:0,
                 from C:\Data\Projects\Vision_iMX\vision_sdk\opencv\modules\python\src2\cv2.cpp:6:
C:/Anaconda3_x86/include/pyconfig.h:440:5: warning: "_MSC_VER" is not defined [-Wundef]
 #if _MSC_VER >= 1800
     ^
[ 76%] Linking CXX shared library ..\..\lib\cv2.pyd
CMakeFiles\opencv_python3.dir/objects.a(cv2.cpp.obj):cv2.cpp:(.text$_ZL8failmsgpPKcz+0x40): undefined reference to `_imp__PyExc_TypeE
CMakeFiles\opencv_python3.dir/objects.a(cv2.cpp.obj):cv2.cpp:(.text$_ZL7failmsgPKcz+0x40): undefined reference to `_imp__PyExc_TypeEr
c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: CMakeFiles\opencv_python3.dir/objects.a(cv2.cpp.obj): bad reloc
collect2.exe: error: ld returned 1 exit status
modules\python3\CMakeFiles\opencv_python3.dir\build.make:224: recipe for target 'lib/cv2.pyd' failed
mingw32-make[2]: *** [lib/cv2.pyd] Error 1
CMakeFiles\Makefile2:7494: recipe for target 'modules/python3/CMakeFiles/opencv_python3.dir/all' failed
mingw32-make[1]: *** [modules/python3/CMakeFiles/opencv_python3.dir/all] Error 2
Makefile:148: recipe for target 'all' failed
mingw32-make: *** [all] Error 2

Do you have any experience on compiling OpenCV for python3 or how to resolve it?

Bets regards, Peter

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Comments

imho, you cut the error msg a bit too short. can we have some more lines before and after that ?

cmake first tries to find a python 3 environment, after that a 2.7 one. it looks like your opencv3 anaconda does not come with dev libs and headers, but hard to see from your snippet (again, too short)

berak gravatar imageberak ( 2015-08-25 07:00:20 -0500 )edit

what exactly and how to include those dev python libs & headers?

peter_cz gravatar imagepeter_cz ( 2015-09-16 02:22:00 -0500 )edit