title: Error installing openCV for python3 on Ubuntu 16.04
body: <p>I tried to install openCV for python3 on Ubuntu 16.04</p>
  
  <p>I used python library on my anaconda virture environment.</p>
  
  <pre><code>cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D \
  PYTHON_LIBRARY=[conda virture env dir]/lib/libpython3.6m.so -D \
  PYTHON_INCLUDE_DIR=[conda virture env dir]/include/python3.6m -D \
  PYTHON_EXECUTABLE=[conda virture env dir]/bin/python3.6 ..
  
  make 
  
  sudo make install
  
  sudo ldconfig
  </code></pre>
  
  <p>I found the <code>cv2.cpython-36m-x86_64-linux-gnu.so</code> file at <code>/usr/local/lib/python3.6/site-packages/</code></p>
  
  <p>and linked the file </p>
  
  <pre><code>ln -s /usr/local/lib/python3.6/site-packages/cv2.cpython-36m-x86_64-linux-gnu.so cv2.so
  </code></pre>
  
  <p>Then I tried to import 'cv2' on python interpreter and I got an error....</p>
  
  <p><img src="https://i.stack.imgur.com/k0rYw.png" alt="enter image description here"></p>