From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#23095: 24.5; python-shell-unbuffered causes problems on Windows Date: Wed, 23 Mar 2016 17:46:28 +0200 Message-ID: <83oaa52o4r.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1458748041 31869 80.91.229.3 (23 Mar 2016 15:47:21 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 23 Mar 2016 15:47:21 +0000 (UTC) Cc: 23095@debbugs.gnu.org To: Will Wykeham Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Mar 23 16:47:11 2016 Return-path: Envelope-to: geb-bug-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 1ail02-0003xR-Qn for geb-bug-gnu-emacs@m.gmane.org; Wed, 23 Mar 2016 16:47:10 +0100 Original-Received: from localhost ([::1]:44621 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ail02-0007DO-Bc for geb-bug-gnu-emacs@m.gmane.org; Wed, 23 Mar 2016 11:47:10 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:48740) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aikzv-00076F-Ko for bug-gnu-emacs@gnu.org; Wed, 23 Mar 2016 11:47:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aikzu-0007Ct-MG for bug-gnu-emacs@gnu.org; Wed, 23 Mar 2016 11:47:03 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:37474) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aikzu-0007Cp-IO for bug-gnu-emacs@gnu.org; Wed, 23 Mar 2016 11:47:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1aikzu-0002aN-Di for bug-gnu-emacs@gnu.org; Wed, 23 Mar 2016 11:47:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 23 Mar 2016 15:47:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 23095 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 23095-submit@debbugs.gnu.org id=B23095.14587480169928 (code B ref 23095); Wed, 23 Mar 2016 15:47:02 +0000 Original-Received: (at 23095) by debbugs.gnu.org; 23 Mar 2016 15:46:56 +0000 Original-Received: from localhost ([127.0.0.1]:34601 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1aikzo-0002a4-ET for submit@debbugs.gnu.org; Wed, 23 Mar 2016 11:46:56 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:57674) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1aikzm-0002Zn-Dh for 23095@debbugs.gnu.org; Wed, 23 Mar 2016 11:46:54 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aikzd-00077X-Dm for 23095@debbugs.gnu.org; Wed, 23 Mar 2016 11:46:49 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:53450) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aikzd-00077Q-Ae; Wed, 23 Mar 2016 11:46:45 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:1880 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1aikzc-0006l5-Gm; Wed, 23 Mar 2016 11:46:45 -0400 In-reply-to: (message from Will Wykeham on Tue, 22 Mar 2016 15:01:27 +0000) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:115392 Archived-At: > Date: Tue, 22 Mar 2016 15:01:27 +0000 > From: Will Wykeham > > (let ((process-environment (python-shell-calculate-process-environment)) > (code (concat "import sys\n" > "print(sys.ps1)"))) > (with-temp-buffer > (let ((code-file (python-shell--save-temp-file code))) > (call-process "python" code-file '(t nil) nil "-i") > (delete-file code-file)) > (buffer-string))) > > In an 'out of the box' emacs, with 'python-shell-unbuffered' set to t as > default, this evaluates to an empty string. > > If python-shell-unbuffered is then set to nil, then the above evaluates to > the expected ">>>\n". > > I haven't got to the bottom of why unbuffered is causing this > problem. My suspicion is that it relates to the fact that > PYTHONUNBUFFERED on Windows also causes python to process stdin/stdout > as binary (which also affects line ending processing). On Windows, Emacs communicates with subprocesses via pipes, which are buffered.