ORM Extensions — SQLAlchemy 2.0.0b1 documentation
From Get docs
Sqlalchemy/docs/latest/orm/extensions/index
ORM Extensions
SQLAlchemy has a variety of ORM extensions available, which add additional functionality to the core behavior.
The extensions build almost entirely on public core and ORM APIs and users should be encouraged to read their source code to further their understanding of their behavior. In particular the “Horizontal Sharding”, “Hybrid Attributes”, and “Mutation Tracking” extensions are very succinct.