# https://stackoverflow.com/questions/18172069/o-i-need-to-set-somehow-create-engine-put-in-singleton-to-be-like-singleton  # noqa: E501
# from __future__ import annotations
# engine = create_engine(DB_URL, echo=False, pool_size=100, pool_recycle=3600)
# session_factory = sessionmaker(bind=engine)
# Session = scoped_session(session_factory)
# session = Session()
# session.query(...)
from __future__ import annotations
