如何生成具有V个可能值的N个时隙的所有可能组合? [英] How to generate all possible combinations of N slots with V possible values?
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问题描述
我有N个有序插槽.每个广告位的值均在V个可能的值之内
I have N ordered slots. Each slot has a value within V possible values
N = 4 # number of objects (e.g. slots)
possible_values = ['A','B']
V = len(possible_values )
如何在Python中生成所有可能组合的列表?例如,当V = 2和N = 4时,我想获得以下2 ** 4种不同组合的列表:
How would it be possible to generate the list of all possible combinations in Python? For instance, when V=2 and N=4, I would like to get the following list of the 2**4 different combinations:
combinations = [
[ 'A', 'A', 'A', 'A' ], # combination 0
[ 'A', 'A', 'A', 'B' ], # combination 1
[ 'A', 'A', 'B', 'A' ], # combination 2
[ 'A', 'A', 'B', 'B' ], # combination 3
[ 'A', 'B', 'A', 'A' ], # combination 4
[ 'A', 'B', 'A', 'B' ], # combination 5
[ 'A', 'B', 'B', 'A' ], # combination 6
[ 'A', 'B', 'B', 'B' ], # combination 7
[ 'B', 'A', 'A', 'A' ], # combination 8
[ 'B', 'A', 'A', 'B' ], # combination 9
[ 'B', 'A', 'B', 'A' ], # combination 10
[ 'B', 'A', 'B', 'B' ], # combination 11
[ 'B', 'B', 'A', 'A' ], # combination 12
[ 'B', 'B', 'A', 'B' ], # combination 13
[ 'B', 'B', 'B', 'A' ], # combination 14
[ 'B', 'B', 'B', 'B' ], # combination 15
]
我希望代码在N和V变化时起作用.例如,当N = 9个插槽且V = 4个可能的值时,我期望列出4 ** 9 = 262144个可能的组合.
I would like the code to work when N and V vary. For example, when N=9 slots and V=4 possible values, I expect the list of the 4**9=262144 possible combinations.
推荐答案
N = 4 # number of objects (e.g. slots)
possible_values = ['A','B']
result = itertools.product(possible_values, repeat=N)
print(list(result))
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