[madenine]

>is it a new environment, or is it an extended Jupyter Notebook? It looks like Jupyter Notebook to me. Why not Jupyter Lab?

Neither? It doesn't change the features of jupyter notebooks, and its not an improved/expanded UI like jupyter lab (you could use nbdev with jupyter lab). Its utilities and automation to make package/library development a better experience if jupyter is where you write your code.

From https://github.com/fastai/nbdev:

"nbdev is a library that allows you to develop a python library in Jupyter Notebooks, putting all your code, tests and documentation in one place."

[kowlo]

Sure, but the OP link that I'm commenting on says it's a "new literate programming environment". Based on what you're quoting, the OP article is incorrect and needs correcting?