Importerror:no module named Cv2

Importerror:no module named CV2 error occurs when installing OPEVNCV, unable to find CV2 package install Apt-get INSTALLPYTHON-OPENCV Expansion pack at this time "or Yum installs Opencv-python "
However, this is a dependent version, specific Python3 installation OpenCV can refer to
Adrian Rosebrock wrote this blog post.

However, when the Raspberry Pi compiled OpenCV sometimes encountered the LIBRARY can not find python3+, you need to be aware of the configuration of Ld_library_path.

Nano ~/.profile

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Add at the end of the environment variable

Export ld_library_path=/usr/lib/: $LD _library_path

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SOURCE ~/.profile

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Once you have configured the OPENCV, you can see that the location of Python can be found, and when compiling, cv2.so will rely on packages path

If you cannot rely on path, clean and then make again