python3函数无法连接python词典

Question

我总是得到一本空字典

#!/usr/local/bin/python3


dic1={1:10, 2:20}
dic2={3:30, 4:40}
dic3={5:50,6:60}
dictNew = {}


def concatDict(dictCon):
    dictNew = dict.update(dictCon)
    return dictNew


concatDict(dic1)
concatDict(dic2)
concatDict(dic3)

print(dictNew)

无法从函数调用更新dictNew

有人能给我指出正确的方向吗

Answer 1

您可以使用concatDicts函数接受可变数量的dict作为输入，并返回新的合并dict

>>> dic1 = {1:10, 2:20}
>>> dic2 = {3:30, 4:40}
>>> dic3 = {5:50, 6:60}
>>>
>>> def concatDicts(*dicts):
...     return dict((k,v) for dic in dicts for k,v in dic.items())
... 
>>>
>>> new_dic = concatDicts(dic1, dic2, dic3)
>>> print(new_dic)
{1: 10, 2: 20, 3: 30, 4: 40, 5: 50, 6: 60}