title: Maximal Length of List to Shuffle with Python random.shuffle?
body: <p>I have a list which I shuffle with the Python built in shuffle function (<code>random.shuffle</code>)</p>
  
  <p>However, the Python reference states:</p>
  
  <blockquote>
    <p>Note that for even rather small <code>len(x)</code>, the total number of permutations of x is larger than the period of most random number generators; this implies that most permutations of a long sequence can never be generated.</p>
  </blockquote>
  
  <p>Now, I wonder what this "rather small len(x)" means. 100, 1000, 10000,...</p>