product_list = [(‘iPhone‘,5800),(‘Mac pro‘,9500),(‘Bike‘,800),(‘Watch‘,10600),(‘Coffee‘,31),(‘Alex Python‘,120)]
shopplist_list =[]
salary = input("Input your salary:")
if salary.isdigit():
salary = int(salary)
while True:
for index,item in enumerate(product_list):
print(index,item)
user_choice = input("你选择要买嘛?>>>:")
if user_choice.isdigit():
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:
shopplist_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 shopplist_list:
print(p)
print("Your current balance:",salary)
exit()
else:
print("invalid option")购物车程序
原文：http://blog.51cto.com/13707996/2308136
