From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Will Wykeham Newsgroups: gmane.emacs.bugs Subject: bug#23095: 24.5; python-shell-unbuffered causes problems on Windows Date: Wed, 23 Mar 2016 16:05:38 +0000 Message-ID: References: <83oaa52o4r.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1458749185 18694 80.91.229.3 (23 Mar 2016 16:06:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 23 Mar 2016 16:06:25 +0000 (UTC) Cc: 23095@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Mar 23 17:06:16 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 1ailIV-0000I1-Ot for geb-bug-gnu-emacs@m.gmane.org; Wed, 23 Mar 2016 17:06:15 +0100 Original-Received: from localhost ([::1]:44846 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ailIV-0000nz-6k for geb-bug-gnu-emacs@m.gmane.org; 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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc; bh=+XoyCDj4MYFslORdsZIHYaMAI72UDbugfdtD3nMZ2r0=; b=MvKDp1OYnigPF/DkrwGFxkSNxQ44fFbBmgN+ywha1jBo8iNAnmTjYkIuuWoEEEQnkZ WxCoRAlPsaRDmf21+b80LV3s0iqc2B+CDSOA2t8isM6EZeXa43COJdDYqtZ8NIkiz+KL Nlb+aXC8Sp1MHu7eJ3Wtmij4Yiuh05rjA80utPcBHzL3pjyJkS09lYBPyIxR8QSJ9C57 SIZaIxRXImgpVzbEK4pUNuT+z24rW7ZIJr5nID9K20RnHBkaGQBzDFecxwTuydl8uf/N HamEK+7sbSXh0J8c6ehAIb3g7iwsKqoLZUvf7OOkiu8uNktnR7LrTDm+XjhYz2C4shmH ehxA== X-Gm-Message-State: AD7BkJKW/6Ce1SBmcjjw0EYCkX1hOherP6vsL+J+fdsAYNJb4AENJ3XBX4uY7et2qOurQB3g6M1nRdlvp/YZ3w== X-Received: by 10.31.141.194 with SMTP id p185mr1783931vkd.57.1458749138862; Wed, 23 Mar 2016 09:05:38 -0700 (PDT) Original-Received: by 10.176.64.198 with HTTP; Wed, 23 Mar 2016 09:05:38 -0700 (PDT) In-Reply-To: <83oaa52o4r.fsf@gnu.org> 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:115396 Archived-At: On 23 March 2016 at 15:46, Eli Zaretskii wrote: >> 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. Ah. In which case, it sounds like the appropriate thing would be to set the default value of 'python-shell-unbuffered' to nil on Windows. Will