python lambda 匿名函数

>>> foo = [2, 18, 9, 22, 17, 24, 8, 12, 27]

>>> print filter(lambda x: x % 3 == 0, foo)

[18, 9, 24, 12, 27]

>>> print map(lambda x: x * 2 + 10, foo)

[14, 46, 28, 54, 44, 58, 26, 34, 64]

>>> print reduce(lambda x, y: x + y, foo)

139