饮品自动售货机python代码

饮品自动售货机的Python代码可以如下所示：

class VendingMachine:
    def __init__(self):
        self.products = {
            'Coke': 10,
            'Pepsi': 8,
            'Sprite': 5
        }
        self.prices = {
            'Coke': 2.5,
            'Pepsi': 2.0,
            'Sprite': 1.5
        }
        self.balance = 0.0

    def display_products(self):
        for product, quantity in self.products.items():
            print(f'{product}: {quantity}')

    def insert_coin(self, amount):
        self.balance += amount

    def purchase(self, product):
        if product not in self.products:
            print("Invalid product!")
            return

        if self.products[product] == 0:
            print("Out of stock!")
            return

        if self.balance < self.prices[product]:
            print("Insufficient balance!")
            return

        self.products[product] -= 1
        self.balance -= self.prices[product]
        print(f"Purchased {product} successfully!")

    def get_change(self):
        change = self.balance
        self.balance = 0.0
        return change


# 示例使用
vending_machine = VendingMachine()
vending_machine.display_products()
vending_machine.insert_coin(5.0)
vending_machine.purchase('Coke')
change = vending_machine.get_change()
print(f"Change: {change}")