def _setmode(self, mode=None):
        if mode is None:
            return self._mode
        if mode not in ["standard", "logo", "world"]:
            return
        self._mode = mode
        if mode in ["standard", "world"]:
            self._angleOffset = 0
            self._angleOrient = 1
        else: # mode == "logo":
            self._angleOffset = self._fullcircle/4.
            self._angleOrient = -1
Set turtle-mode to 'standard', 'world' or 'logo'.
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/site-packages/turtle.py/TNavigator._setmode