10-python元组

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names = ("one","two","three","two")
print(names.count("two"))#获取此元素的个数
print(names.index("two"))#获取此元素最高位的索引，也就是最右边的索引。

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#购物车程序练习
product_list = [
    ("Iphone",5800),
    ("Mac Pro",9800),
    ("Bike",800),
    ("Watch",1800),
    ("Alex python",120)
]
shopping_list = []
salary = input("InPut your salary:")
if salary.isdigit():
    salary = int(salary)
    while True:
        #写法一：item是元组中的每一个元素
        #for item in product_list:
            #print(product_list.index(item),item)
        #写法二：index 是一个元组（里面包含索引和元组中的元素）
        #for index in enumerate(product_list):
            #print(index)
        #写法三：index是索引，item是元素
        for index,item in enumerate(product_list):
            print(index,item)
        user_choice = input("选择要买的商品编号：")
        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:#买的起
                    shopping_list.append(p_item)
                    salary -= p_item[1]
                    print("Add %s into shopping_list,your current 余额:\033[31;1m%d\033[0m"%(p_item,salary))#\033[31;1mXX\033[0m高亮红色,31代表红色
                else:
                    print("\033[41;1m你的余额：{0}\033[0m".format(salary))
            else:
                print("此商品不存在")
        elif user_choice == "q":
            print("-----------------shopping_list-------------")
            for p in shopping_list:
                print(p)#购买的商品
            print("你当前账户余额：%d"%(salary))
            exit()
        else:
            print("输入的无效字符")