birthdays = {
   'Alice': 'Apr 1', 'Bob': 'Dec 12', 'Carol': 'Mar 4'}while True:    print('Enter a name: (blank to quit)')    name = input()    if name == '':        break    if name in birthdays:        print(birthdays[name] + ' is the birthday of ' + name)    else:        print('I do not have birthday information for ' + name)        print('What is their birthday?')        bday = input()        birthdays[name] = bday        print('Birthday database updated.')'''        Enter a name: (blank to quit)AliceApr 1 is the birthday of AliceEnter a name: (blank to quit)xiaomingI do not have birthday information for xiaomingWhat is their birthday?10.1Birthday database updated.Enter a name: (blank to quit)xiaoming10.1 is the birthday of xiaomingEnter a name: (blank to quit)不输入退出程序'''