Mẫu thiết kế trang trí Python và mẫu thiết kế trang trí: Sự khác biệt chính

def log_call(func):
    def wrapper(*args, **kwargs):
        print(f"[LOG] Executing '{func.__name__}' with args {args}")
        result = func(*args, **kwargs)
        print(f"[LOG] '{func.__name__}' returned: {result}")
        return result
    return wrapper

@log_call
def add(a, b):
    return a + b

# The wrapping occurs once at definition time
print("Result of add(5, 7):", add(5, 7))

class Coffee:
    def get_cost(self):
        return 5.0
    def get_description(self):
        return "Simple Coffee"

class MilkDecorator:
    def __init__(self, coffee):
        self.coffee = coffee
    def get_cost(self):
        return self.coffee.get_cost() + 1.5
    def get_description(self):
        return self.coffee.get_description() + ", Milk"

class SugarDecorator:
    def __init__(self, coffee):
        self.coffee = coffee
    def get_cost(self):
        return self.coffee.get_cost() + 0.5
    def get_description(self):
        return self.coffee.get_description() + ", Sugar"

# Chaining wrappers dynamically at runtime
my_drink = Coffee()
my_drink = MilkDecorator(my_drink)
my_drink = SugarDecorator(my_drink)

print("Drink description:", my_drink.get_description())
print("Total Cost: $", my_drink.get_cost())