title: Removing key value pair from list of dictionaries in python
body: <p>I have below list of dictionaries:</p>
  
  <pre><code>&gt;&gt;&gt; d={}
  &gt;&gt;&gt; d['primary info']={"name":"Mark","age":22,"Id":1234}
  &gt;&gt;&gt; d['secondary info']={"location":"Pune"}
  </code></pre>
  
  <p>Now dictionary <code>d</code> has list as following:</p>
  
  <pre><code>{'secondary info': {'location': 'Pune'}, 'primary info': {'age': 22, 'Id': 1234, 'name': 'Mark'}}
  </code></pre>
  
  <ol>
  <li><p>How can I remove <code>age</code> key-value pair from <code>primary info</code>?</p></li>
  <li><p>How can I update value of <code>Id</code> in <code>primary info</code>?</p></li>
  </ol>