def fetch_value(self, select, table_name, where=None, extra=None):
        """
        Fetch a value from the table. Return |None| if no value matches
        the conditions, or the table not found in the database.

        :param str select: Attribute for SELECT query
        :param str table_name: Table name of executing the query.
        :param where: |arg_select_where|
        :type where: |arg_where_type|
        :return: Result of execution of the query.
        :raises simplesqlite.NullDatabaseConnectionError:
            |raises_check_connection|
        :raises simplesqlite.OperationalError: |raises_operational_error|
        """

        try:
            self.verify_table_existence(table_name)
        except TableNotFoundError as e:
            logger.debug(e)
            return None

        result = self.execute_query(
            Select(select, table_name, where, extra), logging.getLogger().findCaller()
        )
        if result is None:
            return None

        fetch = result.fetchone()
        if fetch is None:
            return None

        return fetch[0]
def fetch_value ( self , select , table_name , where = None , extra = None ) : try : self . verify_table_existence ( table_name ) except TableNotFoundError as e : logger . debug ( e ) return None result = self . execute_query ( Select ( select , table_name , where , extra ) , logging . getLogger ( ) . findCaller ( ) ) if result is None : return None fetch = result . fetchone ( ) if fetch is None : return None return fetch [ 0 ]
Fetch a value from the table. Return |None| if no value matches
        the conditions, or the table not found in the database.

        :param str select: Attribute for SELECT query
        :param str table_name: Table name of executing the query.
        :param where: |arg_select_where|
        :type where: |arg_where_type|
        :return: Result of execution of the query.
        :raises simplesqlite.NullDatabaseConnectionError:
            |raises_check_connection|
        :raises simplesqlite.OperationalError: |raises_operational_error|