In the book that @mbobra and I co-edit (helioml.org), we have contributed chapter from various authors and each can have different and even conflicting environments. This means that we can't have a ...

I am working with the .ipynb file (I don't have the paired .py file open and am not editing it) and from time to time the .ipynb file will be rewritten by jupytext. Mostly this results in the .ipynb ...