title: Error: Can't find Python executable "python"
body: <p>SO, I've set python path as in ~/.profile</p>
  
  <pre><code>export PYTHON=$PYTHON:/usr/bin/python 
  </code></pre>
  
  <p>I'm getting. </p>
  
  <pre><code>stack Error: Can't find Python executable ":/usr/lib/python:/usr/lib/python3.5:/usr/lib/python3.5:/usr/bin/python3.5:/usr/bin/python", you can set the PYTHON env variable.
  </code></pre>
  
  <p>What will be the path to the executable python ?</p>