Persistent Collections¶
The persistent
package provides two simple collections that are
persistent and keep track of when they are mutated in place.
-
class
persistent.mapping.
PersistentMapping
(*args, **kwargs)[source]¶ Bases:
UserDict.IterableUserDict
,persistent.Persistent
A persistent wrapper for mapping objects.
This class allows wrapping of mapping objects so that object changes are registered. As a side effect, mapping objects may be subclassed.
A subclass of PersistentMapping or any code that adds new attributes should not create an attribute named _container. This is reserved for backwards compatibility reasons.
-
class
persistent.list.
PersistentList
(initlist=None)[source]¶ Bases:
UserList.UserList
,persistent.Persistent
A persistent wrapper for list objects.
Mutating instances of this class will cause them to be marked as changed and automatically persisted.