购物车程序
购物车程序需求:
1、启动程序后,让用户输入工资,然后打印商品列表
2、允许用户根据商品编号购买商品
3、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
4、可随时退出,退出时,打印已购买商品和余额
product_list = [
('Iphone',5800),
('Mac Pro',9800),
('Bike',800),
('Watch',10600),
('Coffee',31),
('Alex Python',120),
]
shopping_list = []
salary = input("Input your salary:")
if salary.isdigit(): #判断输入的是否是数字,与值是str无关
salary = int(salary)
while True:
for index,item in enumerate(product_list):
#对于一个可迭代、可遍历的对象(如列表、字符串),enumerate将其组成一个索引序列,利用它可以同时获取索引和值
#print(product_list.index(item),item)
print(index,item)
user_choice = input("选择要买嘛?输入q退出!>>>:")
if user_choice.isdigit():
user_choice = int(user_choice)
if user_choice in range(len(product_list)):
p_item = product_list[user_choice]
if p_item[1] <= salary: #买的起
shopping_list.append(p_item)
salary -= p_item[1]
print("Added %s into shopping cart,your current balance is \033[31;1m%s\033[0m" %(p_item,salary) )
else:
print("\033[41;1m你的余额只剩[%s]啦,还买个毛线\033[0m" % salary)
else:
print("product code [%s] is not exist!"% user_choice)
elif user_choice == 'q':
print("--------shopping list------")
for p in shopping_list:
print(p)
print("Your current balance:",salary)
exit()
else:
print("invalid option")