在Python中合并列表的两个字典 [英] To merge two dictionaries of list in Python

问题描述

有两个字典

x={1:['a','b','c']}
y={1:['d','e','f'],2:['g']}

我想要另一个字典z，它是x和y中的一个合并的

I want another dictionary z which is a merged one of x and y such that

z = {1:['a','b','c','d','e','f'],2:['g']}

是否可以执行此操作? 我尝试了更新操作

Is it possible to do this operation? I tried update operation

x.update(y)

但这给了我以下结果

z= {1:['d','e','f'],2:['g']}

推荐答案

在这种情况下可以使用:

Counter() can be used in this case:

>>> x={1:['a','b','c']}
>>> y={1:['d','e','f'],2:['g']}
>>> from collections import Counter
>>> Counter(x) + Counter(y)
Counter({2: ['g'], 1: ['a', 'b', 'c', 'd', 'e', 'f']})

如果需要的结果是字典.您可以使用以下内容:

If desired result is a dict. You can use the following:

z = dict(Counter(x) + Counter(y))

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