python中两个列表的排列
python中两个列表的排列
提问于 2009-12-23 22:44:12
我有两个列表，如：
list1 = ['square','circle','triangle']
list2 = ['red','green']如何创建这些列表的所有排列，如下所示：
[
'squarered', 'squaregreen',
'redsquare', 'greensquare',
'circlered', 'circlegreen',
'redcircle', 'greencircle',
'trianglered', 'trianglegreen',
'redtriangle', 'greentriangle'
]我可以使用itertools来做这件事吗？
回答 4
Stack Overflow用户
回答已采纳
发布于 2009-12-23 22:54:42
>>> import itertools
>>> map(''.join, itertools.chain(itertools.product(list1, list2), itertools.product(list2, list1)))
['squarered', 'squaregreen', 'circlered',
'circlegreen', 'trianglered', 'trianglegreen',
'redsquare', 'redcircle', 'redtriangle', 'greensquare',
'greencircle', 'greentriangle']Stack Overflow用户
发布于 2009-12-23 22:50:02
怎么样
[x + y for x in list1 for y in list2] + [y + x for x in list1 for y in list2]IPython交互示例：
In [3]: list1 = ['square', 'circle', 'triangle']
In [4]: list2 = ['red', 'green']
In [5]: [x + y for x in list1 for y in list2] + [y + x for x in list1 for y in list2]
Out[5]:
['squarered',
'squaregreen',
'circlered',
'circlegreen',
'trianglered',
'trianglegreen',
'redsquare',
'greensquare',
'redcircle',
'greencircle',
'redtriangle',
'greentriangle']Stack Overflow用户
发布于 2009-12-23 22:53:22
我认为您正在寻找的是两个列表的乘积，而不是排列：
#!/usr/bin/env python
import itertools
list1=['square','circle','triangle']
list2=['red','green']
for shape,color in itertools.product(list1,list2):
print(shape+color)收益率
squarered
squaregreen
circlered
circlegreen
trianglered
trianglegreen如果你想同时使用squarered和redsquare，那么你可以这样做：
for pair in itertools.product(list1,list2):
for a,b in itertools.permutations(pair,2):
print(a+b)或者，将其添加到列表中：
l=[a+b for pair in itertools.product(list1,list2)
for a,b in itertools.permutations(pair,2)]
print(l)收益率
['squarered', 'redsquare', 'squaregreen', 'greensquare', 'circlered', 'redcircle', 'circlegreen', 'greencircle', 'trianglered', 'redtriangle', 'trianglegreen', 'greentriangle']页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/1953194
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