object.__getnewargs_ex__() In protocols 4 and newer, classes that implements the __getnewargs_ex__() method can

ndbm.close() Close the ndbm database.

interrupt() You can call this method from a different thread to abort any queries that might be executing on the connection

dbm.ndbm.open(filename[, flag[, mode]]) Open a dbm database and return a ndbm object. The filename argument

sqlite3.sqlite_version_info The version number of the run-time SQLite library, as a tuple of integers.

row_factory You can change this attribute to a callable that accepts the cursor and the original row as a tuple and will return

gdbm.firstkey() It’s possible to loop over every key in the database using this method and the nextkey() method

total_changes Returns the total number of database rows that have been modified, inserted, or deleted since the database connection

fetchone() Fetches the next row of a query result set, returning a single sequence, or

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