Update: I've been using the following this afternoon and haven't run into
any issues so far. However, it looks a bit messy.

(defun python-shell-send-paragraph (&optional send-main msg)
  "Send blocks between two white lines to inferior Python process.
See `python-shell-send-region' for SEND-MAIN and MSG."
  (interactive "P\ni")
  (let ((start
         (save-excursion
           (if (re-search-backward "^[:blank:]*$" nil t)
               (let ((pos (point)))
                 (python-nav-end-of-block)
                 (if (< (point) pos) pos
                   (progn (python-nav-beginning-of-block) (point))))
             (point-min))))
        (end
         (save-excursion
           (if (re-search-forward  "^[:blank:]*$" nil t)
               (progn (python-nav-end-of-block) (point))
             (point-max)))))
    (python-shell-send-region start end send-main (not msg) nil)))

Op zo 30 jul 2023 om 08:35 schreef chiel <machiel.kroon@gmail.com>:

> Right, I hadn't thought about empty lines in any kind of statement. I
> guess I got too excited after learning a little bit of lisp, and thinking
> the function was so beautiful. I'll think about making it more robust.
> Thanks for the response!
>
> On Sun, 30 Jul 2023, 08:29 Eshel Yaron, <me@eshelyaron.com> wrote:
>
>> Hi there,
>>
>> >> Dear python-mode maintainers,
>>
>> I'm not a `python-mode` maintainer, just a user, but here are my two
>> cents:
>>
>> >> I'd like to suggest adding the following command to python.el,
>> >> and binding it to C-<return> by default. I'd love to hear your
>> >> thoughts.
>>
>> Regardless of the command, I'd consider picking another binding
>> (perhaps along side this one) since some users (including yours truly)
>> are used to press `C-m` instead of the `<return>` key.
>>
>> >> (defun python-shell-send-paragraph (&optional send-main msg)
>> >>   "Send all lines of code between two white lines to inferior
>> >> Python process. SEND-MAIN defaults to nil and MSG to t.
>> >> See `python-shell-send-region for more information.
>>
>> I'd say something like "SEND-MAIN and MSG have the same meaning as in
>> `python-shell-send-paragraph', which see." to make this more obvious.
>>
>> >> Interactively, SEND-MAIN is the prefix argument"
>> >>   (interactive "Pi")
>>
>> This is probably supposed to be `(interactive "P\ni")`?
>>
>> >>   (python-shell-send-region
>> >>    (or (save-excursion (re-search-backward "^[:blank:]*$" nil t))
>> (point-min))
>> >>    (or (save-excursion (re-search-forward  "^[:blank:]*$" nil t))
>> (point-max))
>>
>> This method of finding the boundaries of the paragraph at point seems
>> slightly ad-hoc and fragile, I wonder what happens if there's a blank
>> line in the middle of a multi-line string?
>>
>> >>    send-main (not msg) t))
>>
>> Just a couple of thoughts :)
>>
>> Best,
>>
>> --
>> Eshel
>>
>