title: How to combine a list of dictionaries to one dictionary
body: <p>I have a list of dicts:</p>
  
  <pre><code>d =[{'a': 4}, {'b': 20}, {'c': 5}, {'d': 3}]
  </code></pre>
  
  <p>I want to remove the curly braces and convert <code>d</code> to a single dict which looks like:</p>
  
  <pre><code>d ={'a': 4, 'b': 20, 'c': 5, 'd': 3}
  </code></pre>