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gdbm
gdbm
database library. Gdbm objects are of the mapping type, so they can be
handled just like objects of the built-in dictionary type,
except that keys and values are always strings, and printing a gdbm
object doesn't print the keys and values.
The module is based on the Dbm module, modified to use GDBM instead.
The module defines the following constant and functions:
KeyError
is
raised for general mapping errors like specifying an incorrect key.
'r'
, 'w'
,
'c'
, or 'n'
for reader, writer (this also gives read
access), create (writer, but create the database if it doesn't already
exist) and newdb (which will always create a new database). Only one
writer may open a gdbm file and many readers may open the file. Readers
and writers cannot open the gdbm file at the same time. Note that the
GDBM_FAST
mode of opening the database is not supported.
filemode is the UNIX mode of the file, used only when a
database is created (but to be supplied at all times).