From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Rusi Newsgroups: gmane.emacs.help Subject: Re: Multiple prompts when starting inferior Python Date: Tue, 6 May 2014 20:27:09 -0700 (PDT) Message-ID: References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: ger.gmane.org 1399433424 16731 80.91.229.3 (7 May 2014 03:30:24 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 7 May 2014 03:30:24 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed May 07 05:30:19 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WhsYl-0007TV-9P for geh-help-gnu-emacs@m.gmane.org; Wed, 07 May 2014 05:30:19 +0200 Original-Received: from localhost ([::1]:38329 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WhsYk-0001J2-Qm for geh-help-gnu-emacs@m.gmane.org; Tue, 06 May 2014 23:30:18 -0400 X-Received: by 10.66.173.75 with SMTP id bi11mr3413539pac.4.1399433230328; Tue, 06 May 2014 20:27:10 -0700 (PDT) X-Received: by 10.182.213.41 with SMTP id np9mr363722obc.3.1399433230202; Tue, 06 May 2014 20:27:10 -0700 (PDT) Original-Path: usenet.stanford.edu!r10no1396847igi.0!news-out.google.com!qf4ni19igc.0!nntp.google.com!c1no2373163igq.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Original-Newsgroups: gnu.emacs.help In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=59.95.36.247; posting-account=mBpa7woAAAAGLEWUUKpmbxm-Quu5D8ui Original-NNTP-Posting-Host: 59.95.36.247 User-Agent: G2/1.0 Injection-Date: Wed, 07 May 2014 03:27:10 +0000 Original-Xref: usenet.stanford.edu gnu.emacs.help:205302 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:97569 Archived-At: On Tuesday, May 6, 2014 9:47:55 PM UTC+5:30, Joost Kremers wrote: > Hi, > Whenever I start an interactive Python session in Emacs, I get four > empty prompts instead of one. That is, when I do `M-x run-python' (or > start from a Python file with `C-c C-z'), the *Python* buffer looks like > this: > ,---- > | Python 2.7.3 (default, Feb 27 2014, 19:58:35) > | Type "copyright", "credits" or "license" for more information. > | > | IPython 0.12.1 -- An enhanced Interactive Python. > | ? -> Introduction and overview of IPython's features. > | %quickref -> Quick reference. > | help -> Python's own help system. > | object? -> Details about 'object', use 'object??' for extra details. > | > | In [1]: > | In [2]: > | In [3]: > | In [4]: > | > `---- > I use elpy and IPython, but that doesn't make a difference. This is what > I get when running an interactive Python shell with `emacs -Q': > ,---- > | Python 2.7.3 (default, Feb 27 2014, 19:58:35) > | [GCC 4.6.3] on linux2 > | Type "help", "copyright", "credits" or "license" for more information. > `---- > Note the four `>>>'. > This is something that's been happening a while, and it's never really > bothered me. However, the other day someone on Reddit asked the same > question,[1] which prompted me to do some digging. I ran `run-python' > though the debugger and it seems that those prompts are caused by the > function `python-shell-send-setup-code', which sends the contents of the > variables listed in the variable `python-shell-setup-codes' to the > inferior python process when it's started. The default value of this > option is: > ,---- > | (python-shell-completion-setup-code python-ffap-setup-code python-eldoc-setup-code) > `---- > Each of these variables contains some code which, when sent to the > inferior python process, results in a new prompt being displayed, even > though the actual command is not shown. > Is this something that should be considered a bug? Can it be avoided > somehow or should I simply live with it? (Which isn't very difficult, it > doesn't seem to affect anything.) > [1] http://www.reddit.com/r/emacs/comments/24fy1q/help_get_rid_of_multiple_inputs_when_running_a/ Starting python as this python -i -c 'import sys; sys.ps1=""' Makes the >>> disappear. Then you have to arrange to get it back!