marshal.dumps(value[, version]) Return the string that would be written to a file by dump(value, file). The value

isolation_level Get or set the current isolation level.

sqlite3.sqlite_version The version number of the run-time SQLite library, as a string.

gdbm.close() Close the gdbm database.

gdbm.nextkey(key) Returns the key that follows key in the traversal. The following code prints every key in the database

exception pickle.PicklingError Error raised when an unpicklable object is encountered by Pickler. It inherits

iterdump() Returns an iterator to dump the database in an SQL text format. Useful when saving an in-memory database for later

shelve.open(filename, flag='c', protocol=None, writeback=False) Open a persistent dictionary. The filename specified is the

marshal.version Indicates the format that the module uses. Version 0 is the historical format, version 1 shares interned strings

pickle.loads(bytes_object, *, fix_imports=True, encoding="ASCII", errors="strict") Read a pickled object hierarchy from a