bug#32042: 26.1; python.el with ipython prompt leads to superfluous interactive shell output

[Jaan Altosaar]

Here is how I'm starting emacs, with these contents of init.el:

```

(setq

 python-shell-interpreter "ipython"

 python-shell-interpreter-args "--simple-prompt --classic --nosep"

)

```

Then if I open a file `~/tmp/test.py` with the contents:

```

print('test printing')

print('test bug)

```

And run it using `M-x run-python` then `M-x python-shell-send-buffer`,

the output is quite messy:

```

Python 3.6.5 |Anaconda custom (64-bit)| (default, Apr 26 2018, 08:42:37)

Type 'copyright', 'credits' or 'license' for more information

IPython 6.4.0 -- An enhanced Interactive Python. Type '?' for help.

>>> Traceback (most recent call last):

  File "/usr/local/anaconda3/lib/python3.6/site-packages/IPython/core/interactiveshell.py", line 2963, in run_code

    exec(code_obj, self.user_global_ns, self.user_ns)

  File "<ipython-input-1-57ce0cd600e5>", line 1, in <module>

    import codecs, os;__pyfile = codecs.open('''/var/folders/qr/s_h2rhqj6kdg8qrj0zw2scnw0000gn/T/pyLbk6Vh''', encoding='''utf-8''');__code =

__pyfile.read().encode('''utf-8''');__pyfile.close();os.remove('''/var/folders/qr/s_h2rhqj6kdg8qrj0zw2scnw0000gn/T/pyLbk6Vh''');exec(compile(__code, '''/Users/jaan/tmp/test.py''', 'exec'));

  File "/Users/jaan/tmp/test.py", line 2

    print('test bug)

                    ^

SyntaxError: EOL while scanning string literal

```

Is there any way to clean up the output, especially the parts involving

`codecs.open('''/var/folders/qr/s_h2rhqj6kdg8qrj0zw2scnw0000gn/T/pyLbk6Vh'''`?

Thanks so much! Emacs newbie here, may be missing something basic...

In GNU Emacs 26.1 (build 1, x86_64-apple-darwin17.5.0)

 of 2018-06-02 built on 172-16-42-187.DYNAPOOL.NYU.EDU

Recent messages:

Searching for ‘test.py’.... [2 times]

(New file)

Saving file /Users/jaan/tmp/test.py...

Wrote /Users/jaan/tmp/test.py

user-error: Start a Python process first with ‘M-x run-python’ or ‘C-c C-p’.

Shell native completion is disabled, using fallback

Sent: print('test printing')...

Mark set

Quit

user-error: Current buffer has no process

Quit

Configured using:

 'configure --disable-dependency-tracking --disable-silent-rules

 --enable-locallisppath=/usr/local/share/emacs/site-lisp

 --infodir=/usr/local/Cellar/emacs/26.1_1/share/info/emacs

 --prefix=/usr/local/Cellar/emacs/26.1_1 --with-gnutls --without-x

 --with-xml2 --without-dbus --with-imagemagick --with-rsvg --without-ns'

Configured features:

JPEG NOTIFY ACL GNUTLS LIBXML2 ZLIB THREADS LCMS2

Important settings:

  value of $LC_ALL: en_US.UTF-8

  value of $LC_CTYPE: en_US.UTF-8

  value of $LANG: en_US.UTF-8

  locale-coding-system: utf-8-unix

Major mode: Inferior Python

Minor modes in effect:

  compilation-shell-minor-mode: t

  shell-dirtrack-mode: t

  diff-auto-refine-mode: t

  helm-mode: t

  async-bytecomp-package-mode: t

  xclip-mode: t

  ido-everywhere: t

  tooltip-mode: t

  global-eldoc-mode: t

  electric-indent-mode: t

  file-name-shadow-mode: t

  global-font-lock-mode: t

  font-lock-mode: t

  auto-composition-mode: t

  auto-encryption-mode: t

  auto-compression-mode: t

  line-number-mode: t

  global-visual-line-mode: 1

  visual-line-mode: t

  transient-mark-mode: t

Load-path shadows:

None found.

Features:

(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs

rfc822 mml mml-sec epa derived epg gnus-util rmail rmail-loaddefs

mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils

mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr

mail-utils ffap compile python tramp-sh tramp tramp-compat

tramp-loaddefs trampver ucs-normalize shell pcomplete parse-time json

map comint regexp-opt ansi-color vc-git diff-mode image winner thingatpt

cl-extra help-mode helm-command helm-elisp helm-eval edebug helm-info

ring info tool-bar misearch multi-isearch term/xterm xterm time-date

elec-pair helm-mode helm-files helm-buffers helm-tags helm-locate

helm-grep helm-regexp format-spec helm-utils helm-help helm-types helm

easy-mmode helm-source eieio-compat helm-multi-match helm-lib

helm-config helm-easymenu async-bytecomp advice async xclip edmacro

kmacro solarized-theme solarized-definitions ido finder-inf package

easymenu epg-config url-handlers url-parse auth-source cl-seq eieio

eieio-core cl-macs eieio-loaddefs password-cache url-vars seq byte-opt

gv bytecomp byte-compile cconv cl-loaddefs cl-lib mule-util tooltip

eldoc electric uniquify ediff-hook vc-hooks lisp-float-type

tabulated-list replace newcomment text-mode elisp-mode lisp-mode

prog-mode register page menu-bar rfn-eshadow isearch timer select mouse

jit-lock font-lock syntax facemenu font-core term/tty-colors frame

cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai

tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian

slovak czech european ethiopic indian cyrillic chinese composite

charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev

obarray minibuffer cl-preloaded nadvice loaddefs button faces cus-face

macroexp files text-properties overlay sha1 md5 base64 format env

code-pages mule custom widget hashtable-print-readable backquote kqueue

lcms2 multi-tty make-network-process emacs)

Memory information:

((conses 16 405604 13728)

 (symbols 48 31824 1)

 (miscs 40 176 376)

 (strings 32 78802 1488)

 (string-bytes 1 2336041)

 (vectors 16 50728)

 (vector-slots 8 892846 8650)

 (floats 8 126 1059)

 (intervals 56 4765 66)

 (buffers 992 20))