Lost in classmethod

Question

class Rectangle:
def __init__(self, width, height):
self.width = width
self.height = height

def calculate_area(self):
return self.width * self.height

@classmethod
def new_square(cls, side_length):
return cls(side_length, side_length)

square = Rectangle.new_square(5)
print(square.calculate_area())

I cant understand anything...What does @classmethod and the codes below do and why the output is 25? please explain me in easy way....

Answer 1

The @classmethod in this case is defining a method for handling squares. Since squares are rectangles that have sides of equal length they have defined a class method for handling them. The side length is then assigned to both the width and height and the area is calculated. This is why the output is 25.

Answer 2

never easy explain when in c

Answer 3

Thank you so much:)