如何在字典中添加单个键的值

Question

Say I have a dictionary:假设我有一本字典：

a_dictionary = {"a": [1, 2], "b": [3, 4]}

I want to get a resultant dictionary that has the value:我想得到一个具有以下值的结果字典：

a_dictionary = {"a": [3], "b": [7]}

Can someone please help me?有人可以帮帮我吗？

Answer 1

Try this:尝试这个：

for k,v in a_dictionary.items():
    a_dictionary[k] = [sum(v)]

Output:输出：

>>> print(a_dictionary)
{'a': [3], 'b': [7]}