利用python实现简单的循环购物车功能示例代码

# -*- coding: utf-8 -*-__author__ = 'hujianli'shopping = [ ("iphone6s", 5000), ("book python", 81), ("iwach", 3200), ("电视机", 2200)]def zero(name): if len(name) == 0:  print("/033[31;1m您的输入不能为空，清重新输入~~/033[0m")  exit() else:  return Truedef crre(name): if int(name) not in range(len(shopping)):  print("/033[31;1m您输入了错误的序列号，请重新输入~~/033[0m")  exit() else:  return Truegongzi = input("请输入您目前的工资：")if not gongzi.isdigit(): crre()elif len(gongzi) == 0: zero()else: gongzi = int(gongzi) print("=========================================") print("===要购买的列表清单如下： ") for i,j in enumerate(shopping):  print(i, j[0], j[1])shopping_cart = []while True: choice = input("请输入你要购买的商品,输入q或者exit退出选择回到购物车列表： ") if choice.isdigit():  zero(choice)  crre(choice)  choice = int(choice)  goods = shopping[choice]  if gongzi < int(goods[1]):   gongzi -= goods[1]   print("===您的工资余额不够使用了，还差/033[1;31m{}/033[0m请努力挣钱===.".format(abs(gongzi)))  else:   print("您选购的商品:/033[1;32m %s /033[0m 已经加入到购物车.." % (goods[0]))   shopping_cart.append(goods)   gongzi -= goods[1]   print("您的工资余额还剩下:/033[30;42m %s/033[0m"% (gongzi)) elif (choice == "q") or (choice == "exit"):  breakprint('/033[30;42m你已购商品列表/033[0m'.center(42,'-'))for i,j in enumerate(shopping_cart): print("/033[1;32m" + str(i+1) + " " + str(j[0]) + " " + str(j[1]) + "/033[0m")