def _get_strategy(self, key):
        try:
            return self._strategies[key]
        except __HOLE__:
            cls = self._strategy_lookup(*key)
            self._strategies[key] = self._strategies[
                cls] = strategy = cls(self)
            return strategy
dataset/ETHPy150Open zzzeek/sqlalchemy/lib/sqlalchemy/orm/interfaces.py/StrategizedProperty._get_strategy