title: multiple keys in python dictionary, is possible?
body: <p>I'd like to build a dictionary in python in which different keys refer to the same element. I have this dictionary: </p>
  
  <pre><code>persons = {"George":'G.MacDonald', "Luke":'G.MacDonald', "Larry":'G.MacDonald'} 
  </code></pre>
  
  <p>the key refer all to an identical string but the strings have different memory location inside the program, I'd like to make a dictionary in which all these keys refer to the same element, is that possible? </p>