def __init__(self, frm, to, tween=None, ytween=None, noise_fn=None, y_noise_fn=None, xy_noise_fn=None):
        """
        :param frm: a list/tuple containing an (x, y) number (starting point; floats) 
        :param to: a list/tuple containing an (x, y) number (end point; floats)
        :param tween: tween method for the x coordinate (defaults to linear if not specified)
        :param ytween: tween method for the y coordinate (defaults to same as that for x coordinate)
        :param noise_fn: optional noise function for x,t coordinates, returning single value
        :param y_noise_fn: optional noise function for y,t coordinates, returning single value
        :param xy_noise_fn: optional noise function for x,y,t coordinates, returning two values
        """
        super().__init__(frm, to)
        if ytween is None:
            ytween = tween

        self.xy_noise_fn = xy_noise_fn
        self.anim_x = NumberAnimation(self.frm[0], self.to[0], tween, noise_fn)
        self.anim_y = NumberAnimation(self.frm[1], self.to[1], ytween, y_noise_fn)
def __init__ ( self , frm , to , tween = None , ytween = None , noise_fn = None , y_noise_fn = None , xy_noise_fn = None ) : super ( ) . __init__ ( frm , to ) if ytween is None : ytween = tween self . xy_noise_fn = xy_noise_fn self . anim_x = NumberAnimation ( self . frm [ 0 ] , self . to [ 0 ] , tween , noise_fn ) self . anim_y = NumberAnimation ( self . frm [ 1 ] , self . to [ 1 ] , ytween , y_noise_fn )
:param frm: a list/tuple containing an (x, y) number (starting point; floats) 
        :param to: a list/tuple containing an (x, y) number (end point; floats)
        :param tween: tween method for the x coordinate (defaults to linear if not specified)
        :param ytween: tween method for the y coordinate (defaults to same as that for x coordinate)
        :param noise_fn: optional noise function for x,t coordinates, returning single value
        :param y_noise_fn: optional noise function for y,t coordinates, returning single value
        :param xy_noise_fn: optional noise function for x,y,t coordinates, returning two values