title: tuple(aValidTupleOfTypeString) not returning what I expect it to
body: <p>In the standard Python IDE:</p>
  
  <pre><code>&gt;&gt;&gt; tuple("(5,6,7)")
  ('(', '5', ',', '6', ',', '7', ')')
  </code></pre>
  
  <p>is (5,6,7) a valid tuple? If so, why is tuple("(5,6,7)") placing every character in the string into its own spot in the tuple? Thank you so much for your help!</p>