code: def mogrify(self, query, args=None):
          
          conn = self._get_db()
          if PY2:  # Use bytes on Python 2 always
              query = self._ensure_bytes(query, encoding=conn.encoding)
  
          if args is not None:
              query = query % self._escape_args(args, conn)
  
          return query
docs: Returns the exact string that is sent to the database by calling the
          execute() method.
  
          This method follows the extension to the DB API 2.0 followed by Psycopg.