Persistence

The `Persistence` package (version 5.4) provides a specific variant of the persistent base class, `Persistent`, implemented as an ExtensionClass. It is part of the Zope Foundation ecosystem and is primarily intended for use when ExtensionClass semantics are required. For general-purpose object persistence without these specific semantics, the `persistent.Persistent` class from the `persistent` distribution is typically recommended. The library is mature and receives occasional updates, with its most recent release in November 2025.