def blit(self, img, coordinates = (0,0)):

        #can we set a color mode so we can do a little bit of masking here?
        self._mSurface.blit(img.getPGSurface(), coordinates)
This method gets called by the routing engine. The first argument is
dataset/ETHPy150Open sightmachine/SimpleCV/SimpleCV/DrawingLayer.py/DrawingLayer.blit--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/formtools/wizard/views.py/WizardView.dispatch