Python购物车的实现课程

时间：2023-12-29 09:49:50

需求：

1.用户输入工资收入

2.打印商品列表

3.用户选择商品，不断的加入购物车

4.检测用户余额，直接捐款，不足提示余额不足

5.允许主动退出，退出时，打印已购商品列表

重点方法：

打印列表下标的方法：

a=['alex','sys','root','admin']

>>> for index,i in enumerate(a):
...     print(index,i)

0 alex
1 sys
2 root
3 admin

 #!/usr/bin/env python3

 # -*-conding:utf-8-**

 # __Author__:'liudong'

 salary=input("Input your salary:")

 if salary.isdigit():

     salary=int(salary)

 else:

     exit("Invalid data type...")

 welcom_msg='Welcome to Shopping mall'.center(50,'-')

 print(welcom_msg)

 exit_flag=False

 product_list = [

     ('Iphone',5000),

     ('Mac Air',8000),

     ('Mac Pro',9000),

     ('XiaoMi',20),

     ('Coffe',30),

     ('Bike',800),

     ('Cloth',200)

 ]

 shop_car = []

 while not exit_flag:

     #for product_item in product_list:

     #    p_name,p_price = product_item  #可选的写法

     print("Products list".center(50,'-'))

     # for p_name,p_price in product_list:

         # print(p_name,p_price)         #由于此方法后面打印下标时，会变成2个无组，所以用下面的方法打印

     for item in enumerate(product_list):

         index=item[0]

         p_name=item[1][0]

         p_price=item[1][1]

         print(index,'.',p_name,p_price)

     user_choice = input('[q=quit,c=check]What do you want to buy?:')

     if user_choice.isdigit():   #肯定是选商品

         user_choice = int(user_choice)

         if user_choice < len(product_list):

             p_item = product_list[user_choice]

             if p_item[1] <= salary: #买的起

                 shop_car.append(p_item) #放入购物车

                 salary -= p_item[1] #扣钱

                 print('Added [%s] into your shop car,your current balance is \033[31;1m[%s]\033[0m' %

                   (p_item,salary))   ＃字体加颜色

             else:

                 print('Your balance is [%s],cannot afford this product..' %salary)

     else:

         if user_choice == 'q' or user_choice == 'quit':

             print('purchased products as blew:'.center(40,'*'))

             for item in shop_car:

                 print(item)

             print('END'.center(40,'*'))

             print('Your balance is [%s]' %salary)

             print('bye.')

             exit_flag = True

         elif user_choice == 'c' or user_choice == 'check':

             print('purchased products as blew:'.center(40, '*'))

             for item in shop_car:

                 print(item)

             print('Your balance is \033[41;1m[%s]\033[0m' % salary) #背景加颜色

编程的思维还要加强。。。。。

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