Peewee is an open source object-relational mapper (ORM) for the Python programming language released under the MIT License.Peewee provides a lightweight, expressive Python API for interacting with relational databases. Peewee follows the active record pattern used by a number of other object-relational mappers. Peewee supports PostgreSQL, MySQL and SQLite and has many database-specific extensions included in the Playhouse collection of add-ons.Peewee was first released on October 11, 2010.