From: Carsten Dominik <dominik@uva.nl>
To: Peter Westlake <peter.westlake@pobox.com>
Cc: emacs-org list <emacs-orgmode@gnu.org>
Subject: Re: OT: Python help
Date: Tue, 20 Jul 2010 15:12:00 +0200 [thread overview]
Message-ID: <7DE910BA-E35D-4D55-B11B-A875457ABAA5@uva.nl> (raw)
In-Reply-To: <1279631312.15948.1385772637@webmail.messagingengine.com>
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
next prev parent reply other threads:[~2010-07-20 13:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-20 10:47 OT: Python help Carsten Dominik
2010-07-20 11:03 ` Giovanni Ridolfi
2010-07-20 11:13 ` Carsten Dominik
2010-07-20 11:20 ` Puneeth
2010-07-20 11:25 ` Carsten Dominik
2010-07-20 11:28 ` Puneeth
2010-07-20 13:08 ` Peter Westlake
2010-07-20 13:12 ` Carsten Dominik [this message]
2010-07-20 18:03 ` Xiao-Yong Jin
2010-07-20 11:25 ` Giovanni Ridolfi
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