def __call__(self):
        key = self.scopefunc()
        try:
            return self.registry[key]
        except __HOLE__:
            return self.registry.setdefault(key, self.createfunc())
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/util/_collections.py/ScopedRegistry.__call__