Method _check_connection_ok

psycopg/psycopg/_connection_base.py:527–536

(self)

                )

    def _check_connection_ok(self) -> None:
        if self.pgconn.status == OK:
            return

        if self.pgconn.status == BAD:
            raise e.OperationalError("the connection is closed")
        raise e.InterfaceError(
            "cannot execute operations: the connection is"
            f" in status {self.pgconn.status}"
        )

    def _start_query(self) -> PQGen[None]:
        """Generator to start a transaction if necessary."""