title: Bisect a Python List and finding the Index
body: <p>When I use the <code>bisect_left()</code> function, why do I not get the <code>index</code> of the element, but instead <code>index + 1</code>?</p>
  
  <pre><code>import bisect
  
  t3 = ['carver', 'carvers', 'carves', 'carving', 'carvings']
  print bisect.bisect(t3, 'carves')    # 3
  print bisect.bisect(t3, 'carving')   # 4
  print bisect.bisect(t3, 'carver')    # 1
  </code></pre>