title: Using tuple as a dictionary key in Python
body: <p>I am trying to work with a dictionary with tuples of n values as keys. I want to find tuples whose 2nd value is 10 (for example)</p>
  
  <pre><code>('HI', '10', '10', '10', '10', '10000', 'true', '0.5GiB', '8', '100000s', '100MiB')
  ('HI', '100', '10', '10', '10', '100', 'false', '0.5GiB', '8', '100000s', '100MiB')
  ('HI', '100', '10', '10', '10', '1000', 'true', '0.7GiB', '8', '1000s', '100MiB')
  </code></pre>
  
  <p>Any ideads how I can do it? THanks!</p>