dumbdbm — Portable DBM implementation
dumbdbm module is intended as a last resort fallback for the
anydbm module when no more robust module is available. The
module is not written for speed and is not nearly as heavily used as the other
dumbdbm module provides a persistent dictionary-like interface which
is written entirely in Python. Unlike other modules such as
bsddb, no external library is required. As with other persistent
mappings, the keys and values must always be strings.
The module defines the following:
Raised on dumbdbm-specific errors, such as I/O errors.
KeyErroris raised for general mapping errors like specifying an incorrect key.
open(filename[, flag[, mode]])
Open a dumbdbm database and return a dumbdbm object. The filename argument is the basename of the database file (without any specific extensions). When a dumbdbm database is created, files with
.dirextensions are created.
The optional flag argument is currently ignored; the database is always opened for update, and will be created if it does not exist.
The optional mode argument is the Unix mode of the file, used only when the database has to be created. It defaults to octal
0666(and will be modified by the prevailing umask).
Changed in version 2.2: The mode argument was ignored in earlier versions.
In addition to the dictionary-like methods,
provide the following method:
- Generic interface to
- Similar interface to the DBM/NDBM library.
- Similar interface to the GNU GDBM library.
- Persistence module which stores non-string data.
- Utility module used to determine the type of an existing database.