Stefan Behnel ha scritto:
superpollo, 15.06.2010 14:55:
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!
Didn't you want to get it "pythonized"? If it's not understandable, it
can't be pythonic.
maybe i must study itertools then ;-)
thanks
bye
--
http://mail.python.org/mailman/listinfo/python-list
