import sys,os#用户密码字典 name_pass = {'user1': '123', 'user2': '456', 'user3': '789'}#商品列表 shop_list = [ ['iphone7', 6500], ['iphone6', 4500], ['金立s10', 3400], ['华为r79', 2888], ['魅族NOTE5', 1888], ['oppoR9', 3600], ]shop_out = [] #购物车 all_kaixiao = 0 #统计值 #统计三次用户错误锁定 count = 0for i in range(10): name_input = input('请输入用户名:') if name_input in name_pass.keys(): #判断用户存在否 passwd_input = input('请输入密码:') if passwd_input == name_pass[name_input]: #判断对应用户密码 print('恭喜登陆成功！') break else: if count > 1: print('3次输入错误，您账号已锁定') break print('{}用户名不存在或密码错误，请重新输入！'.format(name_input)) count += 1 else: print('{}用户不存在'.format(name_input)) continuemoney = eval(input('请输入你的预购金额:'))print('++++++++++商品清单++++++++++++++')for num, i in enumerate(shop_list, 1): if isinstance(i, list): shop_li = i[0]+"\t"+str(i[1]) print(num, shop_li) else