input: Write a python function to create a Square class that calculates the area and perimeter of a square.
  assert Square(4).calculate_area() == 16
  assert Square(5).calculate_perimeter() == 20
  assert Square(7).calculate_area() == 49
output: class Square:
      def __init__(self, side_length):
          self.side_length = side_length
  
      def calculate_area(self):
          return self.side_length ** 2
  
      def calculate_perimeter(self):
          return 4 * self.side_length