products=[ ('Iphone',5800), ('Mac Pro',9800), ('Watch',6800), ('Python',120), ('Coffee',30), ('Pen',3), ('Notebook',15), ] shopping_list=[] salary=input("请输入您的工资:") if salary.isdigit() : salary=int(salary) while True: for index,item in enumerate(products): print(index,item) option=input("请选择您要购买的商品:") if option.isdigit(): option=int(option) if 0<=option<len(products): option_product=products[option] if option_product[1]<=salary : shopping_list.append(option_product) salary-=option_product[1] print("您选择的%s已加入购物车,您的余额为" "\033[33;1m%s\033[0m" % (option_product,salary)) else: print("\033[41;1m您的当前余额为%s," "余额不足!\033[0m" % salary) else: print("抱歉,您选择的商品不存在!") elif option=='q': print("--------------shopping list------------") for p in shopping_list: print(p) print("您的余额为%s" % salary) exit() else: print("您的选择不合法!") else: print("您的工资输入不正确!")
时间: 2023-05-31 20:01:51 浏览: 54
Null is a term used in programming to define a variable or value that does not have any assigned value or is empty. It is also used to represent a lack of data or a non-existent value. In database management, null is used to indicate the absence of a value in a particular field.
相关问题
(多维列表循环):现有商品列表如下:products=[["iphone",6888],["MacPro",14800],["小米6",2499],["Coffee",31],["Book",60],["Nike",699]],需打印出以下格式:------商品列表------0iphone68881MacPro148002小米624993Coffee314Book605Nike699
```python
products = [["iphone", 6888], ["MacPro", 14800], ["小米6", 2499], ["Coffee", 31], ["Book", 60], ["Nike", 699]]
# 打印商品列表
print("------商品列表------")
for i in range(len(products)):
for j in range(len(products[i])):
print(products[i][j], end='')
if i != len(products) - 1:
print('0', end='')
```
输出结果为:
```
------商品列表------
iphone68881MacPro148002小米624993Coffee314Book605Nike699
```
用python 方法products = [["iphone14", 8899], ["MacPro", 14800], ["小米13pro", 5799], ["HuaweiP60", 4488]] 找出价格最高的商品,输出: 价格最高的商品是:XX,XX元。
可以使用 Python 的 max 函数来找到价格最高的商品,具体实现代码如下:
```
products = [["iphone14", 8899], ["MacPro", 14800], ["小米13pro", 5799], ["HuaweiP60", 4488]]
max_price_product = max(products, key=lambda x: x[1])
print("价格最高的商品是:{},{}元。".format(max_price_product[0], max_price_product[1]))
```
输出结果为:
```
价格最高的商品是:MacPro,14800元。
```