title: Increment value of a hash field in Redis using Python
body: <p>I have created a <code>hash</code> in redis in python as follows:</p>
  
  <pre><code>r.hmset('list:123', {'name': 'john', 'count': 5})
  </code></pre>
  
  <p>How can I increment the value of count for the key <code>list:123</code>?</p>