Python简易购物车实现

<pre>shopping_list = []
product_list = [('iphone',5800),
('mac pro',9800),
('bike',800),
('watch',10600),
('coffee',31),
('python',120)]
salary = input('请输入工资:')
if salary.isdigit():
salary = int(salary)
while True:
for index,item in enumerate(product_list):
print(index,item)
user_choice = input('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: #买得起
shopping_list.append(p_item)
salary -= p_item[1]
print('添加:%s到购物车，余额为：\033[31;1m%s\033[0m' % (p_item,salary))
else:
print('\033[41;1m你的余额%s已不足\033[0m' % salary)
else:
print('商品不存在！')
elif user_choice == 'q':
print('--------- shopping list -------')
for p in shopping_list:
print(p)
print('你的余额%s' % salary)
exit()
else:
print('输入有误！')</pre>