数组（列表）全排列、组合实现方法 python

python语言简单、方便，其内部可以快速实现排列组合算法，下面做简单介绍：

1、一个列表数据任意组合：【自带的库itertools.combinations】

#_*_ coding:utf-8 _*_
#__author__='dragon'
import itertools
list1 = [1,2,3]
list2 = []
for i in range(1,len(list1)+1):
    iter = itertools.combinations(list1,i)
    list2.append(list(iter))

print(list2)

结果：[[(1,), (2,), (3,)], [(1, 2), (1, 3), (2, 3)], [(1, 2, 3)]]

2、排列的实现：【自带的库itertools.permutations】

#_*_ coding:utf-8 _*_
#__author__='dragon'
import itertools
list1 = [1,2,3,4,5]
list2 = []
for i in range(1,len(list1)+1):
    iter = itertools.permutations(list1,i)
    list2.append(list(iter))

print(list2)

结果：[[(1,), (2,), (3,)], [(1, 2), (1, 3), (2, 1), (2, 3), (3, 1), (3, 2)], [(1, 2, 3), (1, 3, 2), (2, 1, 3), (2, 3, 1), (3, 1, 2), (3, 2, 1)]]