What is -s flag in python
<p>From Python Cookbook </p>

<pre><code>python timeit.py -s"import random" -s"x=range(100000); random.shuffle(x)" "sorted(x)"
10 loops, best of 3: 152 msec per loop
</code></pre>

<p>What does the <code>-s</code> flag do?
Searched online, python help and SO. But did not find a good explanation. Thanks.</p>
