def _get_handler(self):
        # determine function from conflict handler string
        handler_func_name = '_handle_conflict_%s' % self.conflict_handler
        try:
            return getattr(self, handler_func_name)
        except AttributeError:
            msg = _('invalid conflict_resolution value: %r')
            raise ValueError(self.conflict_handler % msg)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/argparse/argparse.py/_ActionsContainer._get_handler/swapped operands of `%`