class Circle:

    def __init__(self, radius):

        self._radius = radius

​

    @property

    def radius(self):

        print("Getting radius")

        return self._radius

​

    @radius.setter

    def radius(self, value):

        print("Setting radius")

        if value >= 0:

            self._radius = value

        else:

            raise ValueError("Radius cannot be negative.")

​

    @radius.deleter

    def radius(self):

        print("Deleting radius")

        del self._radius

​

# Creating an instance of the Circle class

circle = Circle(5)

​

# Accessing the radius property (getter is called)

print(circle.radius)

# Output: Getting radius

#         5

​

# Setting the radius property (setter is called)

circle.radius = 7

# Output: Setting radius

​

# Trying to set a negative radius (setter raises an exception)

circle.radius = -3

# Output: Setting radius

#         ValueError: Radius cannot be negative.

​

# Deleting the radius property (deleter is called)

del circle.radius

# Output: Deleting radius