物品租赁程序python代码

以下是一个简单的物品租赁程序的Python代码示例：

rented_items = {}

class Item:
    def __init__(self, name, price_per_day):
        self.name = name
        self.price_per_day = price_per_day
        self.is_rented = False
    
    def rent(self):
        self.is_rented = True
    
    def return_item(self):
        self.is_rented = False
    
    def get_rental_price(self, days):
        return self.price_per_day * days

class Rental:
    def __init__(self, item, renter, days):
        self.item = item
        self.renter = renter
        self.days = days
        self.price = item.get_rental_price(days)
    
    def print_rental_info(self):
        print(f"Rental information:\nItem: {self.item.name}\nRenter: {self.renter}\nDays rented: {self.days}\nTotal price: {self.price}")
    
    def return_item(self):
        self.item.return_item()
        rented_items.pop(self.item.name, None)

def rent_item(item_name, renter, days):
    if item_name in rented_items:
        print("This item is already rented.")
        return
    
    item = items[item_name]
    item.rent()
    rental = Rental(item, renter, days)
    rental.print_rental_info()
    rented_items[item_name] = rental

items = {
    "bike": Item("Bike", 10),
    "car": Item("Car", 50),
    "boat": Item("Boat", 100)
}

while True:
    print("Welcome to the rental program!")
    print("Select an option:")
    print("1. Rent an item")
    print("2. Exit")
    choice = input()
    
    if choice == "1":
        print("Select an item to rent:")
        for item_name in items:
            item = items[item_name]
            if not item.is_rented:
                print(f"{item_name}: {item.price_per_day}/day")
        item_name = input()
        
        if item_name not in items:
            print("Invalid item selection.")
            continue
        
        print("Enter your name:")
        renter = input()
        print("Enter the number of days you want to rent the item:")
        days = int(input())
        rent_item(item_name, renter, days)
    elif choice == "2":
        break
    else:
        print("Invalid choice.")

这个程序使用了一个`Item`类来表示租赁的物品，以及一个`Rental`类来表示租赁信息。程序在一个循环中接受用户输入来租赁物品，并记录已经租赁的物品。当用户要归还物品时，程序会从已租赁的物品列表中删除该物品。