title: Python Unterminated quoted string
body: <p>I started working with python and as I was trying to pass some arguments to <em>os.popen()</em> I keep getting </p>
  
  <blockquote>
    <p>Syntax error: Unterminated quoted string</p>
  </blockquote>
  
  <p>And it is not just on one place basically it happens everywhere, where I use lets say "complicated" arguments. 
  For example:</p>
  
  <pre><code>path="/home/user/Desktop/"
  video="Science Copies Nature's Secrets - Biomimicry-2d1VrCvdzbY.webm"
  os.popen("(python -m json.tool "+PATH+video+"-something.json | grep \"ext\"\")") 
  </code></pre>
  
  <p>I thought it is the <strong>'</strong> in <em>Nature's</em> that makes the problem but even after improving it to <em>Nature\'s</em> it is not working. 
  Another thing that I have tried was to save the command in another variable and than call the os.popen(variable), but no result.</p>
  
  <p>It is probably a stupid problem for the more experienced guys over here, but I would love some actual help or hints. </p>