def add_prefix(self, prefix):
        if not prefix or not hasattr(self, '_callback_str'):
            return
        self._callback_str = prefix + '.' + self._callback_str
Grab this motion event. You can grab a touch if you want
dataset/ETHPy150Open CollabQ/CollabQ/vendor/django/core/urlresolvers.py/RegexURLPattern.add_prefix--crossover with--dataset/ETHPy150Open kivy/kivy/kivy/input/motionevent.py/MotionEvent.grab