>http://docs.python.org/2/library/itertools.html#itertools.takewhile
>
>for item in takewhile(lambda x: x < 5, range(10)):
>    pass

>>
>> [People who avoid the 'break' by functionalizing an inner portion of the
>> loop are just kidding themselves and making their own code worse, IMO.
>> Takewhile from itertools also works, but that's clumsy and wordy as well.]
>>