Go to jupyter.org/try-jupyter/lab Click on 'File / New / Notebook‘. Select Python Pyodide kernel and enter a line of Python code. In the file explorer on the left ...
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 ...