title: Single line for-loop to build a dictionary?
body: <p>I'm constructing a dictionary (which I'll later make into a JSON string). I construct it like this:  </p>
  
  <pre><code>data = {}
  for smallItem in bigList:
      data[smallItem] = smallItem
  </code></pre>
  
  <p>How can I make that for loop one line?</p>