title: Length of the longest sublist?
body: <blockquote>
  <p><strong>Possible Duplicate:</strong><br />
  <a href="https://stackoverflow.com/questions/873327/pythons-most-efficient-way-to-choose-longest-string-in-list">Python’s most efficient way to choose longest string in list?</a></p>
  </blockquote>
  
  <p>I have a list L</p>
  <pre><code>L = [[1,2,3],[5,7],[1,3],[77]]
  </code></pre>
  <p>I want to return the length of the longest sublist without needing to loop through them, in this case 3 because [1,2,3] is length 3 and it is the longest of the four sublists. I tried len(max(L)) but this doesn't do what I want. Any way to do this or is a loop my only way?</p>