Python乘法数组连接

Question

如果我有一个大小不一致的数组，lists 由（不一致的）数量的列表组成：

 lists = [List1, List2, List3,...ListN]

每个包含的列表大小不一致。

如何将每个包含的数组的内容相乘地连接起来。

目标输出示例：

A = ["A","B","C","D"]
B = ["1","2","3","4"]
C = ["D","E","F","G"]
A[0-N] + B[0-N] + C[0-N]

Giving ["A1D","B1D","C1D","D1D",
        "A2D","B2D","C2D","D2D"
        "A3D","B3D","C3D","D3D"
        "A4D","B4D","C4D","D4D"
        "A1E","B1E","C1E","D1E"

         ... "C4G","D4G"  ]

对于这个特定的例子，它应该产生一个 4^3 的列表长度。 （列表长度的列表数量的幂）

但是列表长度不是恒定的，所以它确实是

List1 Length * List2 Length * List3 Length * ... * ListN Length

对于不一致的列表长度：

  A = ["A","B"]
  B = ["1","2","3","4"]

 = ["A1","A2","A3","A4","B1","B2","B3","B4"]

我已经尝试过 python 地图和 zips，但我遇到了一些麻烦，例如：

zip(list1, list2, list3)

何时：

列表数量不一致

这些列表不是单独存储的，而是整理成一个大列表，

而且列表大小不一致

其他 SO 问题上描述的方法仅解决一致的大小、2 个列表、情况。在这种情况下我无法应用这些技术。

Answer 1

import itertools
A = ["A","B"]
B = ["1","2","3","4"]
list(itertools.product(A, B))

通用

lists_var = [List1, List2, List3,...ListN]
list(itertools.product(*lists_var))

Answer 2

使用itertools获取结果，然后根据需要格式化：

import itertools

A = ["A","B","C","D"]
B = ["1","2","3","4"]
C = ["D","E","F","G"]

lists = [A, B, C]

results = [''.join(t) for t initertools.product(*lists)]

print(results)

打印：

['A1D', 'A1E', 'A1F', 'A1G', 'A2D', 'A2E', 'A2F', 'A2G', 'A3D', 'A3E', 'A3F', 'A3G', 'A4D', 'A4E', 'A4F', 'A4G', 'B1D', 'B1E', 'B1F', 'B1G', 'B2D', 'B2E', 'B2F', 'B2G', 'B3D', 'B3E', 'B3F', 'B3G', 'B4D', 'B4E', 'B4F', 'B4G', 'C1D', 'C1E', 'C1F', 'C1G', 'C2D', 'C2E', 'C2F', 'C2G', 'C3D', 'C3E', 'C3F', 'C3G', 'C4D', 'C4E', 'C4F', 'C4G', 'D1D', 'D1E', 'D1F', 'D1G', 'D2D', 'D2E', 'D2F', 'D2G', 'D3D', 'D3E', 'D3F', 'D3G', 'D4D', 'D4E', 'D4F', 'D4G']

Answer 3

itertools.product 是你要找的，我想：

>>> import itertools
>>> A = ["A","B"]
>>> B = ["1","2","3","4"]
>>> C = [A,B]
>>> [''.join(i) for i in itertools.product(*C)]
['A1', 'A2', 'A3', 'A4', 'B1', 'B2', 'B3', 'B4']