1 stu_info = { 2 'liudonghai':{ 3 'house':['三环','四环','五环'], 4 'car':{ 5 'china':['byd','五菱宏光','Hongqi'], 6 'jap':['丰田','本田'], 7 'Genmany':{ 8 'ben-z':2, 9 'bmw':3, 10 'audi':5 11 } 12 } 13 } 14 } 15 #ldh又买了一辆宝马 16 17 print(stu_info.get('liudonghai').get('car').get('Genmany').get('bmw')) 18 stu_info['liudonghai']['car']['Genmany']['bmw'] += 1 19 print(stu_info) 20 #ldh把byd扔了 21 print('='*50) 22 #list删除方法1 23 # stu_info['liudonghai']['car']['china'].remove('byd') 24 #list删除方法2 25 stu_info['liudonghai']['car']['china'].pop(0) 26 27 print(stu_info) 28 29 30 user = { 31 'xiaoming':'123', 32 'xiaobai':'111', 33 'xiaowang':'222' 34 } 35 print('='*60) 36 for i in range(3): 37 username = input('please input a username:') 38 passwd = input('please input a passwd: ') 39 if username in user: 40 print('账号已存在!') 41 else: 42 user[username]= passwd 43 print('注册成功') 44 print(user)