我有一个单词列表,我需要生成所有这些可能的排列,但需要注意一点.

我目前使用以下代码：

from itertools import permutations

wordlist = ["word1", "word2", "word3"]

for perm in permutations(wordlist):
    print "".join(perm)

它给出了输出：

word1word2word3
word1word3word2
...
word3word2word1

但是我还需要它来打印这些单词的子集,例如：

word1    
word1word2
word2word1
...

但我对如何做到这一点没有丝毫想法.
我该从哪里开始？我该怎么读？

解决方法:

编辑：

from itertools import permutations

xlist = ["word1", "word2", "word3"]

for n in range(1, len(xlist)+1):
    for perm in permutations(xlist, n):
        print "".join(perm)

编辑：输出：

word1
word2
word3
word1word2
word1word3
word2word1
word2word3
word3word1
word3word2
word1word2word3
word1word3word2
word2word1word3
word2word3word1
word3word1word2
word3word2word1