如何将值更新为 Python 字典的值和键？

Question

假设我们有这本字典：

thisdict =  {
"brand": ["Ford","Renault", "Nissan"],
"Ford": ["red", "blue", "green"]
}

当我将“Ford”键值更改为“droF”时，我希望它也在品牌列表中更改，反之亦然，如下所示：

thisdict =  {
"brand": ["droF","Renault", "Nissan"],
"droF": ["red", "blue", "green"]
}

有什么办法吗？

Answer 1

使用修改键和值的字典理解：

replacements = {
    "Ford": "droF"
}

def modify(x):
    # if it's in the dict, return the value in the dict
    # otherwise default to itself
    return replacements.get(x, x)

thisdict =  {
    "brand": ["Ford","Renault", "Nissan"],
    "Ford": ["red", "blue", "green"]
}

modified = {
    modify(k): [modify(x) for x in v] for k, v in thisdict.items()
}

print(modified)
# {'brand': ['droF', 'Renault', 'Nissan'], 'droF': ['red', 'blue', 'green']}