bug#71440: Python Inferior Mode Can’t Recognize My Prompt

["shynur ." <one.last.kiss@outlook.com>]

> I wonder how PS1 and PS2 are at all relevant when using 
> python-shell-send-buffer?  That function sends the buffer
> text to Python, so where do PS1 and PS2 come into play,
> and why does Python say "__PYTHON_EL_eval is not defined" 
> just because you have PS1 and PS2 customized?

I know it’s *weird* but it just happened.
I gave the recipes in the original post for anyone to 
reproduce it.

> If someone helps me understand that, maybe I will have 
> further ideas.

How about CC this post to the maintainer(s) of ‘python.el’?

> How about defining PYTHONSTARTUP to point to a different 
> file?

This makes it inconvenient to add or modify content to the 
‘PYTHONSTARTUP’ file because each change needs to be synced
to another file that exists for Emacs.