Jupyter notebooks is an interactive notebook that implements that protocol.
Do you know what also implements the protocol? VS Code. And doesn't have any of the stupid problems that the Jupyter notebooks do.
In VS Code if you do as below:
#%%
print("my python print")
Then you can run it as a cell. Crucially however, note that those delimiters are ALSO valid python code. So you just version as with everything else.
