Decoradores de Propriedade

class Person:
    def __init__(self, name, age):
        self._name = name
        self._age = age
    
    @property
    def age(self):
        return self._age

person = Person("Alice", 30)
print(person.age)

30

class Person:
    def __init__(self, name, age):
        self._name = name
        self._age = age
    
    @property
    def age(self):
        return self._age
    
    @age.setter
    def age(self, value):
        if value < 0:
            raise ValueError("Age cannot be negative")
        self._age = value

person = Person("Alice", 30)
person.age = 31     # Usa o setter com validação
print(person.age)   # Usa o getter

# Isso geraria um erro:
# person.age = -5   # ValueError: A idade não pode ser negativa

31

class Rectangle:
    def __init__(self, width, height):
        self.width = width
        self.height = height
    
    @property
    def area(self):
        return self.width * self.height

rect = Rectangle(5, 3)
print(rect.area)  # Calcula 5 * 3 = 15

15