Elegant Format for a MAC Address in Python 3.2

Question

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?

s=\"\"
h=\"0023         


        

Answer 1

>>> import itertools
>>> h = '00233a990c21'
>>> ':'.join(a+b for a, b in (itertools.izip(
...                              itertools.compress(h, itertools.cycle((1,0))),
...                              itertools.compress(h, itertools.cycle((0,1))))))
>>> '00:23:3a:99:0c:21'

Does that win for the highest density of parentheses?