code: def focus0(self):
          '''
          First focus of the ellipse, Point class.
  
          '''
          f = Point(self.center)
  
          if self.xAxisIsMajor:
              f.x -= self.linearEccentricity
          else:
              f.y -= self.linearEccentricity
          return f focus0(self):
          '''
          First focus of the ellipse, Point class.
  
          '''
          f = Point(self.center)
  
          if self.xAxisIsMajor:
              f.x -= self.linearEccentricity
          else:
              f.y -= self.linearEccentricity
          return f
docs: First focus of the ellipse, Point class.