(self, x, y=None)
return abs(pos - self._position)
Return the distance from the turtle to (x,y) in turtle step units.

        Arguments:
        x -- a number   or  a pair/vector of numbers   or   a turtle instance
        y -- a number       None                            None

        call: distance(x, y)         # two coordinates
        --or: distance((x, y))       # a pair (tuple) of coordinates
        --or: distance(vec)          # e.g. as returned by pos()
        --or: distance(mypen)        # where mypen is another turtle

        Example (for a Turtle instance named turtle):
        >>> turtle.pos()
        (0.00, 0.00)
        >>> turtle.distance(30,40)
        50.0
        >>> pen = Turtle()
        >>> pen.forward(77)
        >>> turtle.distance(pen)
        77.0
Return the distance from the turtle to (x,y) in turtle step units.
Return the distance from the turtle to ( x y ) in turtle step units .
def distance(self, x, y=None):
        """Return the distance from the turtle to (x,y) in turtle step units.

        Arguments:
        x -- a number   or  a pair/vector of numbers   or   a turtle instance
        y -- a number       None                            None

        call: distance(x, y)         # two coordinates
        --or: distance((x, y))       # a pair (tuple) of coordinates
        --or: distance(vec)          # e.g. as returned by pos()
        --or: distance(mypen)        # where mypen is another turtle

        Example (for a Turtle instance named turtle):
        >>> turtle.pos()
        (0.00, 0.00)
        >>> turtle.distance(30,40)
        50.0
        >>> pen = Turtle()
        >>> pen.forward(77)
        >>> turtle.distance(pen)
        77.0
        """
        if y is not None:
            pos = Vec2D(x, y)
        if isinstance(x, Vec2D):
            pos = x
        elif isinstance(x, tuple):
            pos = Vec2D(*x)
        elif isinstance(x, TNavigator):
            pos = x._position
        return abs(pos - self._position)
def distance ( self , x , y = None ) : if y is not None : pos = Vec2D ( x , y ) if isinstance ( x , Vec2D ) : pos = x elif isinstance ( x , tuple ) : pos = Vec2D ( * x ) elif isinstance ( x , TNavigator ) : pos = x . _position return abs ( pos - self . _position )