请补充横线处的代码。dictMenu中存放了你的双人下午套餐（包括咖啡2份和点心2份）的价格，让Python帮忙计算并输出消费总额。
dictMenu = {'卡布奇洛':32,'摩卡':30,'抹茶蛋糕':28,'布朗尼':26}
___①_ _
for i in ____②____:
sum += i
print(sum)dictMenu = {'卡布奇洛':32,'摩卡':30,'抹茶蛋糕':28,'布朗尼':26}
sum=0
dq=dictMenu.values()
for i in dq:
sum += i
print(sum)再举个例子：
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
obj1 = {'a':1,'b':2,'c':3}
obj2 = {'a':1,'b':3,'d':4}
print union_dict(obj1,obj2)
输出
{'a': 2, 'c': 3, 'b': 5, 'd': 4}