title: Python "in" operator speed
body: <p>Is the <code>in</code> operator's speed in python proportional to the length of the iterable?</p>
  
  <p>So,</p>
  
  <pre><code>len(x) #10
  if(a in x): #lets say this takes time A
      pass
  
  len(y) #10000
  if(a in y): #lets say this takes time B
      pass
  </code></pre>
  
  <p>Is A > B?</p>