missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS

Opencv 3.x (missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS)

ImportError: No module named numpy.distutils
-- Found PythonInterp: /home/satur/anaconda3/bin/python3 (found suitable version "3.6.4", minimum required is "3.4") 
-- Could NOT find PythonLibs (missing:  PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS) (Required is exact version "3.6.4")
-- Looking for ccache - not found
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原因：Linux下安装opencv-3.4.1在cmake的时候没有找到python的PYTHON_INCLUDE_DIRS与PYTHON_LIBRARIES位置
解决： 使用-DPYTHON_INCLUDE_DIR 来指明位置，如下所示

cmake .. \
-DPYTHON_INCLUDE_DIR=$(python -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())")  \
-DPYTHON_LIBRARY=$(python -c "import distutils.sysconfig as sysconfig; print(sysconfig.get_config_var('LIBDIR'))")
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如果是系统自带python2，但是使用都是anaconda的python3，只需要指明是python3 -c， 如下

cmake .. \
-DPYTHON_INCLUDE_DIR=$(python3 -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())")  \
-DPYTHON_LIBRARY=$(python3 -c "import distutils.sysconfig as sysconfig; print(sysconfig.get_config_var('LIBDIR'))")
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出处 Stackoverflow Cmake is not able to find Python-libraries