bug#58713: 29.0.50; Completion/ElDoc/FFAP interferes with a running Python program

[kobarity]

Hi,

When a Python program is sent to the Python Shell buffer using
`python-shell-send-buffer' or similar functions, it is run
asynchronously.  So it is possible to invoke Completion/ElDoc/FFAP in
the Python buffer while the program is running.  However, it leads to
several problems:

1. emacs -Q
2. Open the following Python file.

#+begin_src python
import time

for i in range(10):
    print(i)
    time.sleep(1)
#+end_src

3. C-u -1 M-x eldoc-mode (Disable ElDoc mode.)
4. C-c C-p (M-x run-python)
5. C-x o (Back to the Python mode buffer)
6. M-> (M-x end-of-buffer)
7. C-c C-c (M-x python-shell-send-buffer)
8. While the program is running, type "t".
9. C-M-i (M-x completion-at-point)

Output from the program will no longer be displayed and the Python
buffer cannot be manipulated until the program is completed or the
completion is canceled with C-g.

Similar problems occur with ElDoc/FFAP.

These problems are caused by the fact that
`python-shell-send-string-no-output' used by these features replaces
the process-filter.  So I think it is appropriate to disable
Completion/ElDoc/FFAP while a program is running.

Attached is a patch to disable Completion/ElDoc/FFAP when a proper
prompt is not received in the Python Shell buffer.

Best Regards,

--

In GNU Emacs 29.0.50 (build 7, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.16.0, Xaw scroll bars) of 2022-10-15 built on ubuntu
Repository revision: a06c54209499c3885c13a8d3eba7798ab3f0d688
Repository branch: master
System Description: Ubuntu 22.04.1 LTS

Configured using:
 'configure --without-libgmp'

Configured features:
ACL CAIRO FREETYPE GIF GLIB GNUTLS GSETTINGS HARFBUZZ JPEG LIBSELINUX
LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG SECCOMP SOUND SQLITE3 THREADS
TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM LUCID ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Python

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  line-number-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
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Memory information:
((conses 16 66940 7163)
 (symbols 48 8205 0)
 (strings 32 23930 1490)
 (string-bytes 1 694497)
 (vectors 16 13452)
 (vector-slots 8 155649 7354)
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 (buffers 1000 12))

0001-Disable-completion-ElDoc-FFAP-when-Python-program-is.patch
Description: Binary data