def _update(self):
        return
        screen = self.screen
        if screen._tracing == 0:
            return
        elif screen._tracing == 1:
            #self._update_data()
            self._drawturtle()
            #screen._update()                  # TurtleScreenBase
            #screen._delay(screen._delayvalue) # TurtleScreenBase
        else:
            #self._update_data()
            if screen._updatecounter == 0:
                for t in screen.turtles():
                    t._drawturtle()
                #screen._update()
Perform a Turtle-data update.
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/site-packages/turtle.py/RawTurtle._update