title: Efficient Way of making a set of tuple in which the order of tuple doesn't matters
body: <p>I want to make a set of tuples in which the order of tuples shouldn't matter.
  For eg.- If the tuples I want to add is :</p>
  
  <pre><code>[(1,2),(1,3),(2,1)]
  </code></pre>
  
  <p>It should output like this:</p>
  
  <pre><code>{(1,2),(1,3)}
  </code></pre>
  
  <p>Is there any efficient way of doing this in python?</p>