title: Python string formatting
body: <p>I see you guys using</p>
  
  <pre><code>url = '"%s"' % url # This part
  
  &gt;&gt;&gt; url = "http://www.site.com/info.xx"
  &gt;&gt;&gt; print url
  http://www.site.com/info.xx
  &gt;&gt;&gt; url = '"%s"' % url
  &gt;&gt;&gt; print url
  "http://www.site.com/info.xx"
  </code></pre>
  
  <p>Is it advanced Python? Is there a tutorial for it? How can I learn about it?</p>