Python 中如何对单个字典中同一个 key 的值进行合并？

Question

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现在有一个字典

dict = {'A1':12 24 42} 

现在我需要得到这个字典中同一个 key 的值，即返回 12+24+42的结果，要如何合并呢？（value 有多个，不一定为 3 个）

Answer 1

A key in a dictionary cannot have multiple values ​​in Python
The above writing is incorrect
If you want a key to have multiple values, you must use a list to store the values

dic = {'A1':[12,24,42]}

It is very convenient to calculate the sum in this way, as long as

for key in dic:
    dic[key] = sum(dic[key])
print(dic) # {'A1': 78}

Answer 2

The situation mentioned by the poster that the dictionary is in key-value format does not exist at all. A dictionary cannot have duplicate KEYs, and of course each key has only one value