How to use the psycopg2.sql function in psycopg2

def make_dynamic_query(query: str, **identifiers: str) -> str:
    return psycopg2_sql.SQL(query).format(
        **{key: psycopg2_sql.Identifier(value) for key, value in identifiers.items()}
    )

def copy_site_preferences(apps, schema_editor):
    with con.cursor() as cursor:
        table_names = [
            citem.name for citem in con.introspection.get_table_list(cursor)]
        if 'siteprefs_preference' not in table_names:
            return

        # Remove left over siteprefs for app email_action
        cursor.execute(
            sql.SQL(
                'DELETE FROM siteprefs_preference WHERE app = {0}').format(
                    sql.Literal('email_action')))

        # Change logs app to ontask
        cursor.execute(
            sql.SQL('UPDATE siteprefs_preference '
                    + 'SET app={0} where app={1}').format(
                    sql.Literal('ontask'),
                    sql.Literal('logs')))

        # Change max_list_size to max_log_list_size
        cursor.execute(
            sql.SQL('UPDATE siteprefs_preference '
                    + 'SET name={0} where name={1}').format(
                    sql.Literal('max_log_list_size'),
                    sql.Literal('max_list_size')))

def _make_dynamic_query(self, query: str, **identifiers: str) -> str:
        return psycopg2.sql.SQL(query).format(
            **{
                key: psycopg2.sql.Identifier(value)
                for key, value in identifiers.items()
            }

def rename_table(table: str, new_name: str):
    """Rename a table in the database.

    :param table: Current table name

    :param new_name: New table name

    :return: Nothing. Change reflected in the database table
    """
    with connection.connection.cursor() as cursor:
        cursor.execute(sql.SQL('ALTER TABLE {0} RENAME TO {1}').format(
            sql.Identifier(table),
            sql.Identifier(new_name),
        ))