title: Check if two Python sets have at least one common element
body: <p>What is the fastest way to check if two sets in Python have at least one common element? The desired output is a True/False.</p>
  
  <p>e.g. I tried with set.intersection(), but I would like to avoid checking all the elements in both sets.</p>
  
  <pre><code>set.intersection({1,2,3}, {8,9,2})
  &gt;&gt;&gt; {2}
  </code></pre>
  
  <p>NOTE: I'm searching for a very efficient solution that works with Python sets (I'm not asking about lists)</p>