title: What's the most efficient way to access sibling dictionary value in a Python dict?
body: <p>In Python, I've got a list of dictionaries that looks like this:</p>
  
  <pre><code>matchings = [
      {'id': 'someid1', 'domain': 'somedomain1.com'},
      {'id': 'someid2', 'domain': 'somedomain2.com'},
      {'id': 'someid3', 'domain': 'somedomain3.com'}
  ]
  </code></pre>
  
  <p>and, I have a variable:</p>
  
  <pre><code>the_id = 'someid3'
  </code></pre>
  
  <p>What's the most efficient way to retrieve the domain value of the item?</p>