python实现简单的购物程序代码实例

#！/usr/bin/ven python
# Author: Hawkeye
'''
本程序为实例程序：购物车程序

需求:

启动程序后，让用户输入工资，然后打印商品列表
允许用户根据商品编号购买商品
用户选择商品后，检测余额是否够，够就直接扣款，不够就提醒
可随时退出，退出时，打印已购买商品和余额

'''
#创建商品列表
product_list = [
  ["Iphone",5800],
  ["Mac Pro",9800],
  ["bike",800],
  ["watch",10600],
  ["coffee",31],
  ["Alex Python",20]
]
# for i in product_list:
#   print(i)

#创建购物列表
shopping_list =[]
#要求用户输入数据
salary = input("Input your salary:")
#首先要对用户的输入做判断
if salary.isdigit():
  salary = int(salary) #转换为整形
  while True: #循环输出列表
    for index,item in enumerate(product_list):
      print(index,item)
    user_choice = input("请选择要买什么......")
    if user_choice.isdigit():#转换为整形
      user_choice =int(user_choice)
      if user_choice < len(product_list) and user_choice  =0:
        p_item = product_list[user_choice]
        if p_item[1] <=salary:#钱够
          shopping_list.append(p_item)
          salary -= p_item[1]
          print("Added %s into shopping cart,your current balance is 3[31;1m%s3[0m" % (p_item,salary) )
        else:#钱不够
          print("3[41;1m您的余额只剩【%s】，余额不足3[0m" %salary)
      else:
        print("3[32;1mProduct code [%s]is not exist3[0m " %user_choice)
    elif user_choice == "q":

      print("----------shoppig list--------")
      for p in shopping_list:
        print(p)
      print("------------------------------")
      print("3[33;1mYour current balance is :3[0m",salary)
      exit()
    else:
      print("Invalid Option")
else:#输入q退出
  print("3[13;1m【错误】请输入正确的数字!3[0m")
  exit()