From http://www.cnblogs.com/dajianshi/archive/2012/06/06/2827093.html
cur.execute( ... """INSERT INTO some_table (an_int, a_date, another_date, a_string) ... VALUES (%(int)s, %(date)s, %(date)s, %(str)s);""", ... {'int': 10, 'str': "O'Reilly", 'date': datetime.date(2005, 11, 18)})