title: Why tuple is not mutable in Python?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/1538663/why-are-python-strings-and-tuples-are-made-immutable">Why are python strings and tuples are made immutable?</a>  </p>
  </blockquote>
  
  
  
  <p>What lower-level design makes tuple not mutable in Python?  Why this feature is useful?</p>