Method save

marimo/_session/notebook/file_manager.py:404–462

Save the notebook. Args: request: Save request with cell data and options Returns: Serialized notebook content Raises: HTTPException: If save fails or tries to rename

(self, request: SaveNotebookRequest)

            return ""

    def save(self, request: SaveNotebookRequest) -> str:
        """Save the notebook.

        Args:
            request: Save request with cell data and options

        Returns:
            Serialized notebook content

        Raises:
            HTTPException: If save fails or tries to rename
        """
        cell_ids, codes, configs, names, filename, layout = (
            request.cell_ids,
            request.codes,
            request.configs,
            request.names,
            request.filename,
            request.layout,
        )

        filename_path = Path(canonicalize_filename(filename))

        with self._save_lock:
            # Update app with new cell data
            self.app.with_data(
                cell_ids=cell_ids,
                codes=codes,
                names=names,
                configs=configs,
            )

            if self.is_notebook_named and not self._is_same_path(
                filename_path
            ):
                raise HTTPException(
                    status_code=HTTPStatus.BAD_REQUEST,
                    detail="Save handler cannot rename files.",
                )

            # Save layout if provided
            if layout is not None:
                app_dir = filename_path.parent
                app_name = filename_path.name
                layout_filename = save_layout_config(
                    app_dir, app_name, LayoutConfig(**layout)
                )
                self.app.update_config({"layout_file": layout_filename})
            else:
                # Remove the layout from the config
                self.app.update_config({"layout_file": None})

            if request.persist:
                self._invalidate_autosaves()
            return self._save_file(
                filename_path,
                notebook=self.app.to_ir(),
                persist=request.persist,