Example: Python Program to Find Area of Rectangle using Class

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# Python Program to Find Area of Rectangle using Class
class Calculation():

    def __init__(self):
        self.length = 0.0
        self.width = 0.0
        self.area = 0.0

    def main(self):
        print("Enter the length & width of the rectangle::\n")

        self.length = float(input())
        self.width = float(input())

        self.calculateArea()

    # It will calculate area of the rectangle
    def calculateArea(self):
        self.area = self.length * self.width
        print("\nArea of rectangle = ", self.area, "units")

# It will create instance of the StudentData class
Calculation = Calculation()

Calculation.main()