#取值import types allGuests = {'Alice': {'apples': 5, 'pretzels': {'12':{'beijing':456}}}, 'Bob': {'ham sandwiches': 3, 'apple': 2}, 'Carol': {'cups': 3, 'apple pies': 1}} def dictget(dict1,obj,default=None): for k,v in dict1.items(): if k == obj: prin