An object that manages sessions.
If an object already exists in the manager with key “k”, it is returned.
Otherwise, create a new subobject of the type supported by this container with key “k” and return it.
An object willing to manage a ZODB database connection
Dictionary-like object that supports additional methods and attributes concerning invalidation. expiration and conflict resolution.
SessionData objects support the full Python dictionary interface (e.g. __getitem__, __delitem__, get, has_key, etc).