python字典合并

字典合并，相同的键对应的值相加

import os
a = {"han":1 , "sh":2}
b = {"han":2}
d = {'han':1 , "sh":3}

def union_dict(*objs):
    keys = set(sum([obj.keys() for obj in objs] , []))
    total = {}
    for key in keys:
        total[key] = sum([obj.get(key , 0) for obj in objs])
    return total

print(union_dict(a , b , d))