title: Parse Aws IoT message in python
body: <p>I want to realize an AWS Lambda function that parse a json message received from IoT.</p>
  
  <p>I receeve this json:</p>
  
  <pre><code>{u'Ut': 1488467722, u'Rh': 59.4, u'Id': u'test', u'Temp': 21.6}
  </code></pre>
  
  <p>How can I parse this string to store each value into a variable?</p>
  
  <p>Thanks</p>