Python作业day2购物车

流程图：

实现情况：

可自主注册，

登陆系统可购物，充值（暂未实现），查询余额。

撸了两天一夜的代码，不多说，直接上码，注释神马的后面再说

 #!/usr/bin/env python
 # -*- coding:utf-8 -*-
 shopping_list = [
         ['Iphone 6s plus',5800],
         ['Lumia',3800],
         ['Charge',45],
         ['Data line',35],
         ['MI 5 PRO',2299],
         ['MX4',1999],
 ]
 salary = 100000
 total = 0
 shop_list = []

 while True:
     welcome_1 = "欢迎使用XXX购物商城"
     we_1 = welcome_1.center(30,'*')
     print(we_1)
     choice_1 = "1.注册 2.登陆 q.退出"
     ch_1 = choice_1.center(32,'*')
     exit_1 = "谢谢使用，欢迎下次光临"
     ex_1 = exit_1.center(30,'*')
     error_1 = "您输入的用户已存在，请重新输入"
     e_1 = error_1.center(30,'-')
     error_2 = "密码不能为空，请重新输入"
     e_2 = error_2.center(30,'-')
     error_3 = "您输入的密码太短，请重新输入"
     e_3 = error_3.center(30,'-')
     error_4 = "您的输入有误, 请重新输入"
     e_4 = error_4.center(26,'*')
     error_5 = " 您的账号已被锁定，请联系管理员 "
     e_5 = error_5.center(12,'*')
     print(ch_1 )
     sr_1 = input("Please input:")
     if sr_1 == '1':
         while True:
             with open('ming.txt','r')as r_1:
                 temp = r_1.readlines()
                 tlist = []
             for tline in temp:
                 tline = tline.strip().split(':')
                 tlist.append(tline[0])
             useradd = input("Please create user:")
             success_1 = "成功创建用户：%s" %(useradd)
             if useradd in tlist:
                 print(e_1 )
             elif useradd == "exit":
                 break
             else:
                 passwd = input("Please create a password(Letters and numbers)：")
                 length = len(passwd)
                 if length == 0 :
                     print(e_2)
                 elif length > 7:
                     with open('ming.txt','a')as r_3:
                         w_1 = '%s:%s:0\n' %(useradd,passwd)
                         r_3.write(w_1)
                         s_1 = success_1.center(30,'-')
                         print(s_1)
                         break
                 else:
                     print(e_3)

     elif sr_1 == '2':
         flag = False
         while True:
             username = input("Please enter a user name:")
             l = open('lock.txt','r')
             for lline in l.readlines():
                 lline = lline.strip()
                 if username == lline:
                     print("账号被锁")
                     flag = True
                     l.close()
                     break
             if  flag == True:
                 break

             u = open('ming.txt','r')
             for uline in u.readlines():
                 user,password,mony = uline.strip().split(':')

                 if username == user:
                     i = 0
                     while  i < 3:
                         passwd = input('Please enter a password:')
                         i +=1
                         if passwd == password:
                             print('欢迎%s登陆在线购物平台' % username)
                             flag = True
                             u.close()
                             break
                         else:
                             if i >= 3:
                                 with open('lock.txt','a') as l_2:
                                     l_2.write(username + '\n')
                                     l.close()
                                 exit("试了太多次,将被锁定，请联系管理员")
                             print('密码输入错误，还有%d次机会' % (3 - i))
                     break
             else:
                 print("用户输入错误，请重新输入")

             while True:
                 print("1.购物 2.查看购物车 3.查询余额 4.充值 b.返回登陆 q.退出")
                 print("------------------------------------------------")
                 choice_2 = input("输入序号：")
                 flag_1 = False
                 while True:
                     if choice_2 == "":
                         while True:
                             for index,g in enumerate(shopping_list):
                                 print(index,g[0],g[1])
                             print("-------------------------")
                             print("c.查看购物车 b.返回 q.退出")
                             print("-------------------------")
                             choice = input("键入数字选择商品：").strip()
                             if choice.isdigit():
                                 choice = int(choice)
                                 p_price = shopping_list[choice][1]
                                 if p_price < salary:
                                     shop_list.append(shopping_list[choice])
                                     total += p_price
                                     salary -= p_price
                                     print("-------------------------")
                                     print("您购买了%s，余额为%s"%(shopping_list[choice][0],salary))
                                     print("-------------------------")
                                 else:
                                     print("-------------------------")
                                     print("您的余额不足")
                                     print("-------------------------")
                             elif choice == "c":
                                 while True:
                                     print("----------购物车----------")
                                     for k,v in enumerate(shop_list):
                                         print(k,v[0],v[1])
                                     print("已消费金额为：%s"%total)
                                     print("您的可用余额：%s"%salary)
                                     print("-------------------------")
                                     print("d.删除商品 b.返回购物 q.结算退出")
                                     print("-------------------------")
                                     choice_1 = input("请键入字母选择功能：")
                                     print("-------------------------")
                                     if choice_1 == "d":
                                         print("-------------------------")
                                         print("输入数字为删除商品，输入字母b为返回购物车")
                                         print("-------------------------")
                                         while True:
                                             choice_2 = input("请选择：")
                                             if choice_2.isdigit():
                                                 choice_2 = int(choice_2)
                                                 d_price = shop_list[choice_2][1]
                                                 shop_list.remove(shop_list[choice_2])
                                                 total -= d_price
                                                 salary += d_price
                                                 print("-------------------------")
                                                 print("商品%s删除成功，可用余额为：%s"%(shop_list[choice_2][0],salary))
                                                 print("-------------------------")
                                             elif choice_2 == "b":
                                                 break
                                     elif choice_1 == "b":
                                         flag = True
                                         break
                                     else:
                                         print("----------购物清单----------")
                                         for k,v in enumerate(shop_list):
                                             print(k,v[0],v[1])
                                         print("总消费金额为：%s"%total)
                                         print("您的可用余额：%s"%salary)
                                         print("--------欢迎下次再来-------")
                                         exit(0)
                             elif choice == "b":
                                 break
                             elif choice == "q":
                                 print("----------购物清单----------")
                                 for k,v in enumerate(shop_list):
                                     print(k,v[0],v[1])
                                 print("总消费金额为：%s"%total)
                                 print("您的可用余额：%s"%salary)
                                 print("--------欢迎下次再来--------")
                                 exit(0)
                             else:
                                 print("-------------------------")
                                 print("您的输入有误，请重新输入")
                                 print("-------------------------")
                         if flag == True:
                             break
                     elif choice_2 == "":
                         print("----------购物车----------")
                         for k,v in enumerate(shop_list):
                             print(k,v[0],v[1])
                         print("已消费金额为：%s"%total)
                         print("您的可用余额：%s"%salary)

                         print("-------------------------")
                         break
                     elif choice_2 == "":
                         with open('ming.txt','r')as m_1:
                             mony_1 = m_1.readlines()
                         for mline in mony_1:
                             (user,password,mony) = mline.strip().split(':')
                             print(salary)
                             flag_1 = True
                             break
                         break

                     elif choice_2 == "":
                         z  = 0
                         while z < 1:
                             chongzhi = int(input("输入金额:"))
                             passwd_1 = input("请输入密码：")
                             m = open('ming.txt','r+')
                             m_2 = m.readlines()

                             for mline in m_2:
                                 (user,password,mony) = mline.strip().split(':')

                                 if passwd_1 == password:
                                     mony_2 = (chongzhi + int(mony))

                                     w_2 = '%s:%s:%s\n' %(username,password,mony_2)
                                     m.write(w_2)
                                     print("充值成功")
                                     print(mony)
                                     flag = True
                                     break
                                 continue
                             break
                         if flag == True:
                             break

                     elif choice_2 == "b":
                         flag = True
                         break

                     elif choice_2 == "q":
                         exit(ex_1)
                     else:
                         print(e_4)
                         break
                     break
                 if flag == True:
                     break
             break
     elif sr_1 == 'q':
         exit(ex_1)
     else:
         print(e_4)
         print('                                   ')

购物车