pythonize this!

[Jean-Michel Pichavant]

superpollo wrote:
> superpollo ha scritto:
>> Peter Otten ha scritto:
>>> superpollo wrote:
>>>
>>>> goal (from e.c.m.): evaluate
>>>> 1^2+2^2+3^2-4^2-5^2+6^2+7^2+8^2-9^2-10^2+...-2010^2, where each three
>>>> consecutive + must be followed by two - (^ meaning ** in this context)
>>>
>>>>>> from itertools import cycle, izip
>>>>>> sum(sign*i*i for sign, i in izip(cycle([1]*3+[-1]*2), range(1, 
>>>>>> 2011)))
>>> 536926141
>>
>> don't understand it bit i like this a lot!
>                       ^^^
>
> *but*
Works for women as well, we don't understand them, yet we love them ;)

JM