title: Issue installing OpenCV 4.1.2 on Jetson Nano. import cv2, No module named 'cv2'
body: <p>I installed OpenCV 4.1.2 from source with CUDA support. Had no issues. and created a symbolic link from OpenCV’s installation directory to my virtualenv</p>
  
  <pre><code>ln -s /usr/local/lib/python3.6/site-packages/cv2/python3.6/cv2.cpython-36m-aarch64-linux-gnu.so cv2.so
  </code></pre>
  
  <p>I am having an issue with import cv2</p>
  
  <pre><code>$ python
  Python 3.6.9 (default, Nov  7 2019, 10:44:02) 
  [GCC 8.3.0] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import cv2
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ModuleNotFoundError: No module named 'cv2'
  &gt;&gt;&gt; 
  </code></pre>
  
  <p>I checked site-packages directory and I can see cv2.so. I am obviously missing something.
  The main issue here in my view I am not able to link to my virtualenv, in fact I am able to check my installation and its working </p>
  
  <pre><code> /usr/local/lib/python3.6/site-packages/cv2/python-3.6$ python
  Python 3.6.9 (default, Nov  7 2019, 10:44:02) 
  [GCC 8.3.0] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import cv2
  &gt;&gt;&gt;
  </code></pre>