Python, Programming, Data Science, Artificial Intelligence, Data.
Circle: def __init__(self, radius=1): self.radius = radius def area(self): return 3.14 * self.radius ** 2 my_circle = Circle() print(my_circle.radius) # Output: 1 print(my_circle.area()) # Output: 3.14 In this example, we define a Circle class with a constructor that has a default value of 1 for