Version 0.4 of package Code-Cells has just been released in GNU ELPA. You can now find it in M-x list-packages RET.
Code-Cells describes itself as: ================================================== Lightweight notebooks with support for ipynb files ================================================== More at https://elpa.gnu.org/packages/code-cells.html ## Summary: ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ CODE-CELLS.EL — LIGHTWEIGHT NOTEBOOKS IN EMACS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ This package lets you efficiently navigate, edit and execute code split into cells according to certain magic comments. If you have [Jupytext] or [Pandoc] installed, you can also open ipynb notebook files directly in Emacs. They will be automatically converted to a script for editing, and converted back to notebook format when saving. <https://raw.githubusercontent.com/astoff/code-cells.el/images/screenshot.png> By default, three styles of comments are recognized as cell boundaries: ┌──── │ # In[<number>]: │ │ # %% Optional title │ │ #* Optional title └──── ## Recent NEWS: [Not available 🙁]