From mboxrd@z Thu Jan  1 00:00:00 1970
From: Carsten Dominik <dominik@uva.nl>
Subject: Re: OT: Python help
Date: Tue, 20 Jul 2010 15:12:00 +0200
Message-ID: <7DE910BA-E35D-4D55-B11B-A875457ABAA5@uva.nl>
References: <97ED60B0-D01C-47DB-9B5E-10F1B39E3892@uva.nl><83vd8a1kkv.fsf@yahoo.it>
	<606EFD47-1329-43F8-8496-1A0B0A2390E9@uva.nl><AANLkTinBySzroRDzJtSLfUlMT9mIUg5w5Or6Ein5x0OE@mail.gmail.com>
	<AANLkTimR2R2jH8Bz5NStX6_akzzghWZ5-_HQtk8E8D1E@mail.gmail.com>
	<1279631312.15948.1385772637@webmail.messagingengine.com>
Mime-Version: 1.0 (Apple Message framework v936)
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Content-Transfer-Encoding: 7bit
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from [140.186.70.92] (port=34791 helo=eggs.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1ObCcB-00030F-Ee
	for emacs-orgmode@gnu.org; Tue, 20 Jul 2010 09:12:08 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69)
	(envelope-from <dominik@uva.nl>) id 1ObCc9-00010r-Vi
	for emacs-orgmode@gnu.org; Tue, 20 Jul 2010 09:12:07 -0400
Received: from postduif.ic.uva.nl ([145.18.40.180]:42412)
	by eggs.gnu.org with esmtp (Exim 4.69)
	(envelope-from <dominik@uva.nl>) id 1ObCc9-00010F-NW
	for emacs-orgmode@gnu.org; Tue, 20 Jul 2010 09:12:05 -0400
In-Reply-To: <1279631312.15948.1385772637@webmail.messagingengine.com>
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <http://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <http://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: Peter Westlake <peter.westlake@pobox.com>
Cc: emacs-org list <emacs-orgmode@gnu.org>


On Jul 20, 2010, at 3:08 PM, Peter Westlake wrote:

>
>
> On Tue, 20 Jul 2010 16:58 +0530, "Puneeth" <punchagan@gmail.com>  
> wrote:
>> On Tue, Jul 20, 2010 at 4:50 PM, Puneeth <punchagan@gmail.com> wrote:
>>> On Tue, Jul 20, 2010 at 4:43 PM, Carsten Dominik <dominik@uva.nl>  
>>> wrote:
>>>> Please show me the full line of code, I am currently editing a  
>>>> python script
>>>> without any knowledge of python...
>>>
>>> my_string = "Hello\nWorld"
>>> my_new_string = my_string.replace("\n", "\n> ")
>>
>> Sorry, this code (obviously) doesn't prepend ">" to the first line
>> Add this line to do that.
>>
>> my_new_string = "> " + my_new_string
>
> Here's a Pythonic way to do it, tested:
>
>  import re
>
>  my_string = "Hello\nWorld"
>  pattern = re.compile('^',re.MULTILINE)
>  my_new_string = re.sub(pattern, '> ', my_string)
>
> This still might not be quite right, as it will turn "Hello\nWorld\n"
> into "> Hello\n> World\n> ". Avoid that by using a negative lookahead
> for the end of the string:
>
>  my_string = "Hello\n\nWorld\n"
>  pattern = re.compile('^(?!\Z)',re.MULTILINE)
>  my_new_string = re.sub(pattern, '> ', my_string)
>  print my_new_string
>
> gives:
>
>> Hello
>>
>> World
>
>
> Peter.


Great.  I learned something today.  Thanks!

- Carsten


- Carsten