Python doesn't show anything
<p>It's my first Python program and my first excercise is that I just need to swap places in a tuple:</p>

<pre><code>stamboom = [("Frans","Eefje"), ("Klaar","Eefje"), ("Eefje","Mattho"),
            ("Eefje","Salammbo"), ("Gustave","Mattho"), ("Gustave","Salambo")]
</code></pre>

<p>Is the tuple, and I need to swap Frans with Eefje (those are just names) and then swap the second tuple.</p>

<p>I read the whole data structure tutorial off Python and I thought I could do this like this:</p>

<pre><code>#!/path/to/python

stamboom = [("Frans","Eefje"), ("Klaar","Eefje"), ("Eefje","Mattho"),
            ("Eefje","Salammbo"), ("Gustave","Mattho"), ("Gustave","Salambo")]

def switchplace(x): 
    stamboom[x], stamboom[x + 1] = stamboom[x + 1], stamboom[x]
    return stamboom

map(switchplace, range(0, len(stamboom)))
</code></pre>

<p>It doens't give syntax errors but it doesn't show anything.</p>
