Method _cmd

pymongo/synchronous/mongo_client.py:1940–1954

(
            _session: Optional[ClientSession],
            server: Server,
            conn: Connection,
            read_preference: _ServerMode,
        )

                    )

        def _cmd(
            _session: Optional[ClientSession],
            server: Server,
            conn: Connection,
            read_preference: _ServerMode,
        ) -> Response:
            operation.reset()  # Reset op in case of retry.
            return server.run_operation(
                conn,
                operation,
                read_preference,
                self._event_listeners,
                unpack_res,
                self,
            )

        return self._retryable_read(
            _cmd,