'Helper function for degrees() and radians()'

def _setDegreesPerAU(self, fullcircle):

    self._fullcircle = fullcircle
    self._degreesPerAU = (360 / fullcircle)
    if (self._mode == 'standard'):
        self._angleOffset = 0
    else:
        self._angleOffset = (fullcircle / 4.0)
