Executing cells with certain cell tags

[gvmichael]

I am creating an extension that selects cells with certain cell tags and executes them in a jupyter notebook. I am able to get a list of cells that have the desired cell tag, but I can't figure out how to execute the code in the cells. I have been trying with Notebook Controller but have been getting an error that Notebook Controller is NOT associated with notebook ....

The code I have been using to define the Notebook Controller (where matchingCells is defined by other code):

   const controller = vscode.notebooks.createNotebookController('runcelltags-kernel', 'runcellsnb', 'runcells');
	controller.executeHandler = (cells: vscode.NotebookCell[]) => {
		for (const cell of cells) {
			const execution = controller.createNotebookCellExecution(cell);
			execution.start();
			execution.end(undefined);
		}
	};
	context.subscriptions.push(controller);

        const notebook= vscode.window.activeNotebookEditor.notebook;
        controller.executeHandler(matchingCells,notebook,controller);

Is my Notebook Controller defined right, and if so, how can I properly associate the Notebook Controller with the current notebook? Or is there a better way to execute cells?

Thank you!