from itertools import islicedef split_every(n, iterable): i = iter(iterable) piece = list(islice(i, n)) while piece: yield piece piece = list(islice(i, n))
一些测试：
>>> list(split_every(5, range(9)))[[0, 1, 2, 3, 4], [5, 6, 7, 8]]>>> list(split_every(3, (x**2 for x in range(20))))[[0, 1, 4], [9, 16, 25], [36, 49, 64], [81, 100, 121], [144, 169, 196], [225, 256, 289], [324, 361]]>>> [''.join(s) for s in split_every(6, 'Hello world')]['Hello ', 'world']>>> list(split_every(100, []))[]
