class shelve.DbfilenameShelf(filename, flag='c', protocol=None, writeback=False) A subclass of Shelf which accepts
marshal.dumps(value[, version]) Return the string that would be written to a file by dump(value, file). The value
exception dbm.error A tuple containing the exceptions that can be raised by each of the supported modules, with a unique exception
class sqlite3.Connection A SQLite database connection has the following attributes and methods:
gdbm.nextkey(key) Returns the key that follows key in the traversal. The following code prints every key in the database
sqlite3.sqlite_version The version number of the run-time SQLite library, as a string.
shelve.open(filename, flag='c', protocol=None, writeback=False) Open a persistent dictionary. The filename specified is the
class sqlite3.Cursor A Cursor instance has the following attributes and methods.
isolation_level Get or set the current isolation level.
dumbdbm.sync() Synchronize the on-disk directory and data files. This method is called by the Shelve.sync() method
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