title: python script for downloading youtube video
body: <p>I am trying to download a youtube video using python.Below is my code.But it is giving me ValueError: Attempted relative import in non-package.Can anyone help me solving this issue.I am new to python ...Someone please help</p>
  
  <pre><code>  import pafy
    url = raw_input("https://www.youtube.com/watch?v=PT2_F-1esPk")
    video = pafy.new(url)
    t= video.title
    r = video.rating
    print t
    print r
    best = video.getbest("mp4")
    filename = best.download(quiet = False)
  </code></pre>