我想编写一个脚本来获取类别列表,并返回将类别拆分为2组的独特方法。现在我以元组形式(list_a,list_b)使用它,其中list_a和list_b的并集代表完整的类别列表。
下面我展示了一个类别['A','B','C','D']的示例,我可以获得所有组。然而,有些是重复的(['A'],['B','C','D'])代表与(['B','C','D'],['A'相同的分裂])。我如何只保留唯一的分裂?还有什么是这篇文章更好的标题?
import itertools
def getCompliment(smallList, fullList):
compliment = list()
for item in fullList:
if item not in smallList:
compliment.append(item)
return compliment
optionList = ['A','B','C','D']
combos = list()
for r in range(1,len(optionList)):
tuples = list(itertools.combinations(optionList, r))
for t in tuples:
combos.append((list(t),getCompliment(list(t), optionList)))
print(combos)
[(['A'], ['B', 'C', 'D']),
(['B'], ['A', 'C', 'D']),
(['C'], ['A', 'B', 'D']),
(['D'], ['A', 'B', 'C']),
(['A', 'B'], ['C', 'D']),
(['A', 'C'], ['B', 'D']),
(['A', 'D'], ['B', 'C']),
(['B', 'C'], ['A', 'D']),
(['B', 'D'], ['A', 'C']),
(['C', 'D'], ['A', 'B']),
(['A', 'B', 'C'], ['D']),
(['A', 'B', 'D'], ['C']),
(['A', 'C', 'D'], ['B']),
(['B', 'C', 'D'], ['A'])]
我需要以下内容:
[(['A'], ['B', 'C', 'D']),
(['B'], ['A', 'C', 'D']),
(['C'], ['A', 'B', 'D']),
(['D'], ['A', 'B', 'C']),
(['A', 'B'], ['C', 'D']),
(['A', 'C'], ['B', 'D']),
(['A', 'D'], ['B', 'C'])]
答案 0 :(得分:3)
你非常接近。您需要的是set
个结果。
由于set
元素必须是可清除的,并且list
个对象不可清除,因此您可以使用tuple
。这可以通过对代码进行一些微不足道的更改来实现。
import itertools
def getCompliment(smallList, fullList):
compliment = list()
for item in fullList:
if item not in smallList:
compliment.append(item)
return tuple(compliment)
optionList = ('A','B','C','D')
combos = set()
for r in range(1,len(optionList)):
tuples = list(itertools.combinations(optionList, r))
for t in tuples:
combos.add(frozenset((tuple(t), getCompliment(tuple(t), optionList))))
print(combos)
{frozenset({('A',), ('B', 'C', 'D')}),
frozenset({('A', 'C', 'D'), ('B',)}),
frozenset({('A', 'B', 'D'), ('C',)}),
frozenset({('A', 'B'), ('C', 'D')}),
frozenset({('A', 'C'), ('B', 'D')}),
frozenset({('A', 'D'), ('B', 'C')}),
frozenset({('A', 'B', 'C'), ('D',)})}
如果您需要将结果转换回列表列表,可以通过列表理解来实现:
res = [list(map(list, i)) for i in combos]
[[['A'], ['B', 'C', 'D']],
[['B'], ['A', 'C', 'D']],
[['A', 'B', 'D'], ['C']],
[['A', 'B'], ['C', 'D']],
[['B', 'D'], ['A', 'C']],
[['B', 'C'], ['A', 'D']],
[['A', 'B', 'C'], ['D']]]