def push(self, attrs=None):
        if attrs is None:
            attrs = self.push_attrs
        values = [getattr(self, x) for x in attrs]
        self.push_attrs_stack.append((attrs, values))
Push attribute values in `attrs` onto the stack
dataset/ETHPy150Open kivy/kivy/kivy/input/motionevent.py/MotionEvent.push