我需要探索列表的每个排列。让我们说我有这个启动变量:
samplelist = [1, 2, 3, 4, 5, 6, 7, 8, 9]
示例输出为:
output = [[1, 2, 3, 4, 5, 6, 7, 8, 9], [1, 3, 2, 4, 5, 6, 7, 8, 9], [1, 3, 4, 2, 5, 6, 7, 8, 9], [1, 3, 5, 3, 2, 6, 7, 8, 9]] .... and so on.
这就是我的所作所为:
import itertools
samplelist = [1, 2, 3, 4, 5, 6, 7, 8, 9]
def combinations(iterable, r):
pool = tuple(iterable)
n = len(pool)
if r > n:
return
indices = range(r)
yield tuple(pool[i] for i in indices)
while True:
for i in reversed(range(r)):
if indices[i] != i + n - r:
break
else:
return
indices[i] += 1
for j in range(i+1, r):
indices[j] = indices[j-1] + 1
yield tuple(pool[i] for i in indices)
list(combinations_with_replacement(samplelist, 9))
由于列表的长度为9,因此9的阶乘为362,880。我试图获取列表中元素的所有组合
但我的输出并不是我想要实现的目标。
答案 0 :(得分:0)
itertools.permutations(samplelist)返回9!列表