18_product_property_decorators.py

class Product:
    def __init__(self, name, price):
        self.name = name
        self._price = price  # Protected attribute
    
    @property
    def price(self):
        print("Getting price...")
        return self._price
    
    @price.setter
    def price(self, value):
        print("Setting price...")
        if value < 0:
            raise ValueError("Price cannot be negative")
        self._price = value
    
    @price.deleter
    def price(self):
        print("Deleting price...")
        del self._price

# Example usage
if __name__ == "__main__":
    product = Product("Laptop", 1000)
    
    # Using getter
    print(f"Current price: {product.price}")
    
    # Using setter
    product.price = 1200
    print(f"New price: {product.price}")
    
    # Trying to set negative price
    try:
        product.price = -100
    except ValueError as e:
        print(f"Error: {e}")
    
    # Using deleter
    del product.price
    try:
        print(product.price)
    except AttributeError:
        print("Price has been deleted")