Any reason there are no returned value from set.add
<p>Current, since the returned value from <code>set.add</code> is always <code>None</code>. I have to do the following.</p>

<pre><code>if 1 in s:
    print 'already found'
    return
s.add(1)
</code></pre>

<p>Would it be nice if I can</p>

<pre><code>if not s.add(1):
    print 'already found'
    return
</code></pre>
