Python: Essential Reference, Third Edition

dbhash

The dbhash module is used to open databases using the bsddb module, but with an interface that closely matches the interface of the other database modules.

open(
							filename
							[,flag=’r’ [,
							mode
							])

Opens a DB database and returns the database object. A database object, d, returned by open() behaves like a dictionary and also provides the following methods:

Method	Description
d.first()	Returns the first key in the database
d.last()	Returns the last key in a database traversal
d.next(key)	Returns the next key following key in the database
d.previous(key)	Returns the item that comes before key in a forward traversal of the database
d.sync()	Writes unsaved data to the disk

error

Exception raised on database errors other than KeyError. Same as bsddb.error ...