title: python ~ youtube-dl: error: no such option: --audio-format
body: <p>Here is my code : </p>
  
  <pre><code>call(['youtube-dl', '-i', '--extract-audio', '--audio-format mp3','-w','ytsearch:'+song ,'-o '+song2file(song)+'.%(ext)s'], shell=False)
  </code></pre>
  
  <p>Note:This is an implementation of this code : <code>youtuble-dl -i --extract-audio --audio-format mp3 -w ytsearch:Wham Bam -o WhamBam.%(ext)s</code>
  Where song =  Wham Bam, When I run this cmd it works  perfectly but the python implementation is not working.</p>
  
  <p>On running it, it returns me this error:</p>
  
  <blockquote>
    <p>youtube-dl: error: no such option: --audio-format</p>
  </blockquote>