title: How authenticate redis server using python redis-py?
body: <p>I have to connect remote <strong>redis</strong> server using <code>redis-py.</code> 
  I have code like this. </p>
  
  <pre><code>import redis
  r = redis.StrictRedis('user:password@host:9921',db=1)
  </code></pre>
  
  <p>Its not working .</p>
  
  <p>I tried this one too .</p>
  
  <pre><code>&gt;&gt;&gt; import redis
  &gt;&gt;&gt; r = redis.StrictRedis(host=host,username=username,password=password ,port=6379, db=1)
  </code></pre>
  
  <p>But not working .Basically i want to connect redis hosted in 
  <strong>redistogo.com</strong>
  How can i connect using python ?</p>