Python の宿題ここで答えます Part 2

[230 デフォルトの名無しさん 2011/02/17(木) 02:20:00]

>>229
x, y = 1, 2
sum_ = 0
while x < 400 * 1000:
    if x % 2 == 0: sum += x
    x, y = y, x+y
print sum_


def fib(stop):
    x, y = 1, 2
    while x <= stop:
        yield x
        x, y = y, x+y

print sum(x for x in fib(400 * 1000) if x % 2 == 0)