打印块形成一个列表

Question

如何从列表中打印大小为5的块，以及不具有块大小为5的其余尾端

例如

a = list(range(23))

我要打印出

[0,1,2,3,4], [5,6,7,8,9], [10,11,12,13,14], [15,16,17,18,19], [20,21,22]

Answer 1

来自itertools recipes：

from functools import partial
from itertools import islice

def take(n, iterable):
    return tuple(islice(iterable, n))

def chunked(iterable, n):
    return iter(partial(take, n, iter(iterable)), tuple())

a = list(range(23))
print(list(chunked(a, 5)))
# [(0, 1, 2, 3, 4), (5, 6, 7, 8, 9), (10, 11, 12, 13, 14), 
#  (15, 16, 17, 18, 19), (20, 21, 22)]

或简单地：

n = 5
[a[j:j+n] for j in range(0, len(a), n)]