_gdbm

This module provides an interface to the GNU DBM (GDBM) library.

This module is quite similar to the dbm module, but uses GDBM instead to
provide some additional functionality.  Please note that the file formats
created by GDBM and dbm are incompatible.

GDBM objects behave like mappings (dictionaries), except that keys and
values are always immutable bytes-like objects or strings.  Printing
a GDBM object doesn't print the keys and values, and the items() and
values() methods are not supported.

Classes

error

with_traceback(...)

  Exception.with_traceback(tb) --
      set self.__traceback__ to tb and return self.

args = <attribute 'args' of 'BaseException' objects>

characters_written = <attribute 'characters_written' of 'OSError' objects>

errno = <member 'errno' of 'OSError' objects>
  POSIX exception code

filename = <member 'filename' of 'OSError' objects>
  exception filename

filename2 = <member 'filename2' of 'OSError' objects>
  second exception filename

strerror = <member 'strerror' of 'OSError' objects>
  exception strerror

Functions

open

open(filename, flags='r', mode=438, /)

  Open a dbm database and return a dbm object.

  The filename argument is the name of the database file.

  The optional flags argument can be 'r' (to open an existing database
  for reading only -- default), 'w' (to open an existing database for
  reading and writing), 'c' (which creates the database if it doesn't
  exist), or 'n' (which always creates a new empty database).

  Some versions of gdbm support additional flags which must be
  appended to one of the flags described above.  The module constant
  'open_flags' is a string of valid additional flags.  The 'f' flag
  opens the database in fast mode; altered data will not automatically
  be written to the disk after every change.  This results in faster
  writes to the database, but may result in an inconsistent database
  if the program crashes while the database is still open.  Use the
  sync() method to force any unwritten data to be written to the disk.
  The 's' flag causes all database operations to be synchronized to
  disk.  The 'u' flag disables locking of the database file.

  The optional mode argument is the Unix mode of the file, used only
  when the database has to be created.  It defaults to octal 0o666.

Other members

open_flags = 'rwcnfsu'