This package contains a generic transaction implementation for Python.
It is mainly used by the ZODB, though.

Note that the data manager API, transaction.interfaces.IDataManager, is
syntactically simple, but semantically complex. The semantics were not
easy to express in the interface. This could probably use more work. The
semantics are presented in detail through examples of a sample data
manager in transaction.tests.test_SampleDataManager.