SQLAlchemy mutable

SQLAlchemy-Mutable aspires to be the most powerful and flexible SQLAlchemy database column type.

Its features include:

1. Nested mutation tracking
2. Mutation tracking for list and dict
3. Support for storing database models in mutable columns
4. Support for common literals and datetime objects
5. Support for custom mutable classes
6. Support for converting existing classes to mutable classes

Read the docs.