DAG Based notebooks?

[stefaneidelloth]

I currently try to write a JavaScript extension that observes a Jupyter Notebook and builds a DAG. However, it already seems to be hard to get and evaluate the output of a single cell:

How to get output model for a given cell in a JupyterLab extension?

I am able to access a cell model and its corresponding widget. How can I get the corresponding output model? I would like to know the output expression (“b”) and its corresponding value (“3”). (My aim is to use this information for building a DAG of the “simple” cells, having a single named output.) [image] As a workaround, I could get the output value “3” from the div element of the widget dom e.g. with let div = cellWidget.outputArea.node.children[0] extractOutputValueFromDiv(div) However…

Maybe that is one of the reasons why other implementations of observable notebooks are based on extra kernels?

Related:

Jupyter:

• Cell dependency graph · Issue #1175 · jupyter/notebook · GitHub
• javascript - How to use events in jupyterlab extensions? - Stack Overflow

ObservableHQ:

• Noob: Can you run your own Observable server - #37 by stefaneidelloth - Community Help - The Observable Forum
• An Unofficial ObservableHQ Compiler 💻 / Alex Garcia | Observable

Starboard:

• Reactive math notebook · Issue #21 · gzuidhof/starboard-notebook · GitHub
• How to interact with notebook and listen to cell changes? · Issue #74 · gzuidhof/starboard-notebook · GitHub