'Set or return the current tilt-angle.
Optional argument: angle -- number
Rotate the turtleshape to point in the direction specified by angle,
regardless of its current tilt-angle. DO NOT change the turtle\'s
heading (direction of movement).
If angle is not given: return the current tilt-angle, i. e. the angle
between the orientation of the turtleshape and the heading of the
turtle (its direction of movement).
Deprecated since Python 3.1
Examples (for a Turtle instance named turtle):
>>> turtle.shape("circle")
>>> turtle.shapesize(5,2)
>>> turtle.tilt(45)
>>> turtle.tiltangle()'

def tiltangle(self, angle=None):

    if (angle is None):
        tilt = (((- self._tilt) * (180.0 / math.pi)) * self._angleOrient)
        return ((tilt / self._degreesPerAU) % self._fullcircle)
    else:
        self.settiltangle(angle)
