Elegant Format for a MAC Address in Python 3.2
<p>I am looking for a more elegant solution to formatting a MAC address with colons. I am using Python 3.2.  A fancy list comprehension perhaps?</p>

<pre><code>s=""
h="00233a990c21"
for i in range(0,12,2):
    s += h[i:i+2] + ":"
s=s[:-1]
print("s=",s)
</code></pre>
