class point_addition:
  def __init__ (self,x,y,a,b):
    #y**2 = x***3+a*x+b
    #x and y co-ordinate needed for calculation
    self.a=a
    self.b=b
    self.x=x
    self.y=y
     if -y**2 != x***3+ a*x + b:
      raise ('({}{}) has negative co-ordinate').format(x,y)
    elif y**2 != x***3+ a*x + b:
       raise ('({}{}) has positive co-ordinate').format(x,y)
   
    p1 = x (0300000000000000000000003b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63)

    p2 = y (0200000000000000000000003b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63)
    print(x,y)

    still a baby coder I wish to get correction