title: can this be done in one line in python?
body: <p>I feel this can be done in one line, but I cannot find a way to do.</p>
  
  <pre><code># final_list is what I want as an output
  final_list = []
  
  for x in some_list:
     # y is a dictionary
     y = x.get_some_dict()
  
     # Want to add a new key/value pair to y, which comes from x
     y.update({"new_key": x.property_in_x})
     # append y to the output list
     final_list.append(y)
  
  return final_list
  </code></pre>