Method _rotate

Python/Turtle.py:1506–1509

Turn turtle counterclockwise by specified angle if angle > 0.

(self, angle)

        self._goto(ende)

    def _rotate(self, angle):
        """Turn turtle counterclockwise by specified angle if angle > 0."""
        angle *= self._degreesPerAU
        self._orient = self._orient.rotate(angle)

    def _goto(self, end):
        """move turtle to position end."""