title: Pytz Timezone from UTC offset
body: <p>I'm using Facebook's graph API with Python. For any <code>user_id</code>, it gives the timezone of the user as a float which represents the offset from UTC.</p>
  
  <p>Example: For someone in India, it gives 5.5</p>
  
  <p>How would I convert this into a valid <code>timezone</code> like <code>Asia/Kolkata</code>?</p>
  
  <p>I've looked into <code>pytz</code> but didn't find any suitable ways to do it.</p>