如何根据 Python 中的键和值合并两个字典？

Question

我在根据其键和值合并 Python 中的两个词典时遇到问题。我有以下情况：

dictionary_1 = { 1{House: red, index=1} , 2{House: blue, index=2} , 3{House: green, index=3}}



dictionary_2 = { 4{Height: 3, index =3} , 5{Height: 5, index=1} , 6{Height: 6, index=2}

因此，例如在 "dictionary_1" 中，我有一本大词典，其键是“1”、“2”和“3”。 =24=]，其值为“{House: red, index=1}”和“{House: blue, index=2}”和“{House: green, index=3}”。 如您所见，大字典的值也是字典本身。同样的逻辑也适用于 dictionary_2.

我的目标是比较两个大词典的值："dictionary_1" 和 "dictionary_2"。然后，如果两个词典的 "Index" 项具有相同的值，我想将它们合并在一起，而不复制 "index" 项。

因此输出应该是这样的：

dictionary_output = { 1{House: red, index=1, Height:5} , 2{House: blue, index=2, Height:6} , 3{House: green, index=3, Height: 3}}

Answer 1

setdefault 是您遇到此类问题的朋友

dictionary_1 = { 1: { "House": "red", "index": 1},
                 2: { "House": "blue", "index": 2},
                 3: { "House": "green", "index": 3}}

dictionary_2 = { 4: { "Height": 3, "index": 3},
                 5: { "Height": 5, "index": 1},
                 6: { "Height": 6, "index": 6}}

output = {}

for k, v in dictionary_1.items():
    o = output.setdefault(v.get("index"), {})
    o['House'] = v['House']
    o['index'] = v['index']

for k, v in dictionary_2.items():
    o = output.setdefault(v.get("index"), {})
    o['Height'] = v['Height']
print(output)

将产生：

{1: {'House': 'red', 'Height': 5, 'index': 1}, 2: {'House': 'blue', 'index': 2}, 3: {'House': 'green', 'Height': 3, 'index': 3}, 6: {'Height': 6}}

如何根据 Python 中的键和值合并两个字典？

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