persistent_id(obj) Do nothing by default. This exists so a subclass can override it. If

execute(sql[, parameters]) Executes an SQL statement. The SQL statement may be parameterized (i. e. placeholders instead of

exception pickle.PickleError Common base class for the other pickling exceptions. It inherits

executescript(sql_script) This is a nonstandard shortcut that creates a cursor object by calling the cursor() method

in_transaction

class shelve.DbfilenameShelf(filename, flag='c', protocol=None, writeback=False) A subclass of Shelf which accepts

executemany(sql[, parameters]) This is a nonstandard shortcut that creates a cursor object by calling the cursor()

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

exception dbm.error A tuple containing the exceptions that can be raised by each of the supported modules, with a unique exception

create_aggregate(name, num_params, aggregate_class) Creates a user-defined aggregate function. The