* OT: Python help
@ 2010-07-20 10:47 Carsten Dominik
2010-07-20 11:03 ` Giovanni Ridolfi
0 siblings, 1 reply; 10+ messages in thread
From: Carsten Dominik @ 2010-07-20 10:47 UTC (permalink / raw)
To: emacs-org list
Hi there,
a python question: How do I prefix every line in a multiline string
with a string. For example, I would like to add "> " before all lines
in a string....
Thanks
- Carsten
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: OT: Python help
2010-07-20 10:47 OT: Python help Carsten Dominik
@ 2010-07-20 11:03 ` Giovanni Ridolfi
2010-07-20 11:13 ` Carsten Dominik
0 siblings, 1 reply; 10+ messages in thread
From: Giovanni Ridolfi @ 2010-07-20 11:03 UTC (permalink / raw)
To: Carsten Dominik; +Cc: emacs-org list
Carsten Dominik <dominik@uva.nl> writes:
> a python question: How do I prefix every line in a multiline string
> with a string. For example, I would like to add "> " before all lines
> in a string....
how about replacing "\n" with "\n > " ?
Giovanni
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: OT: Python help
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 ` Giovanni Ridolfi
0 siblings, 2 replies; 10+ messages in thread
From: Carsten Dominik @ 2010-07-20 11:13 UTC (permalink / raw)
To: Giovanni Ridolfi; +Cc: emacs-org list
On Jul 20, 2010, at 1:03 PM, Giovanni Ridolfi wrote:
> Carsten Dominik <dominik@uva.nl> writes:
>
>
>> a python question: How do I prefix every line in a multiline string
>> with a string. For example, I would like to add "> " before all
>> lines
>> in a string....
>
> how about replacing "\n" with "\n > " ?
Please show me the full line of code, I am currently editing a python
script without any knowledge of python...
:(
- Carsten
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: OT: Python help
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 11:25 ` Giovanni Ridolfi
1 sibling, 2 replies; 10+ messages in thread
From: Puneeth @ 2010-07-20 11:20 UTC (permalink / raw)
To: Carsten Dominik; +Cc: emacs-org list
On Tue, Jul 20, 2010 at 4:43 PM, Carsten Dominik <dominik@uva.nl> wrote:
>
> On Jul 20, 2010, at 1:03 PM, Giovanni Ridolfi wrote:
>
>> Carsten Dominik <dominik@uva.nl> writes:
>>
>>
>>> a python question: How do I prefix every line in a multiline string
>>> with a string. For example, I would like to add "> " before all lines
>>> in a string....
>>
>> how about replacing "\n" with "\n > " ?
>
> 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> ")
HTH,
Puneeth
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: OT: Python help
2010-07-20 11:13 ` Carsten Dominik
2010-07-20 11:20 ` Puneeth
@ 2010-07-20 11:25 ` Giovanni Ridolfi
1 sibling, 0 replies; 10+ messages in thread
From: Giovanni Ridolfi @ 2010-07-20 11:25 UTC (permalink / raw)
To: Carsten Dominik; +Cc: emacs-org list
Carsten Dominik <dominik@uva.nl> writes:
> On Jul 20, 2010, at 1:03 PM, Giovanni Ridolfi wrote:
>
>> Carsten Dominik <dominik@uva.nl> writes:
>>
>>
>>> a python question: How do I prefix every line in a multiline string
>>> with a string. For example, I would like to add "> " before all
>>> lines
>>> in a string....
>>
>> how about replacing "\n" with "\n > " ?
>
> Please show me the full line of code, I am currently editing a python
> script without any knowledge of python...
>
> :(
Carsten , I do not know python as well :-/
I found:
1. from python docs: http://docs.python.org/library/string.html
string.replace(str, old, new[, maxreplace])
Return a copy of string str with all occurrences of substring old replaced by new. If the optional argument maxreplace is given, the first maxreplace occurrences are replaced.
2. while googling:
"Python like this:
python -c 'import sys; print sys.stdin.read().replace("\n", " ")' < days.txt"
http://linux.dsplabs.com.au/rmnl-remove-new-line-characters-tr-awk-perl-sed-c-cpp-bash-python-xargs-ghc-ghci-haskell-sam-ssam-p65/
3. also: http://bytes.com/topic/python/answers/721547-replace-characters-string
# >>> s = "sex_m-designer_bw-size_42"
# >>> s = s.replace('_', '=')
# >>> s = s.replace('-', '&')
# >>> s
# 'sex=m&designer=bw&size=42'
4. http://stackoverflow.com/questions/930303/python-string-cleanup-manipulation-accented-characters
name-of-the-string.replace(' ', '.') # replace spaces with periods
hth
Giovanni
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: OT: Python help
2010-07-20 11:20 ` Puneeth
@ 2010-07-20 11:25 ` Carsten Dominik
2010-07-20 11:28 ` Puneeth
1 sibling, 0 replies; 10+ messages in thread
From: Carsten Dominik @ 2010-07-20 11:25 UTC (permalink / raw)
To: Puneeth; +Cc: emacs-org list
On Jul 20, 2010, at 1:20 PM, Puneeth wrote:
> On Tue, Jul 20, 2010 at 4:43 PM, Carsten Dominik <dominik@uva.nl>
> wrote:
>>
>> On Jul 20, 2010, at 1:03 PM, Giovanni Ridolfi wrote:
>>
>>> Carsten Dominik <dominik@uva.nl> writes:
>>>
>>>
>>>> a python question: How do I prefix every line in a multiline
>>>> string
>>>> with a string. For example, I would like to add "> " before all
>>>> lines
>>>> in a string....
>>>
>>> how about replacing "\n" with "\n > " ?
>>
>> 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> ")
Thanks, that does work.
- Carsten
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: OT: Python help
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
1 sibling, 1 reply; 10+ messages in thread
From: Puneeth @ 2010-07-20 11:28 UTC (permalink / raw)
To: Carsten Dominik; +Cc: emacs-org list
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
> HTH,
> Puneeth
>
--
Puneeth
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: OT: Python help
2010-07-20 11:28 ` Puneeth
@ 2010-07-20 13:08 ` Peter Westlake
2010-07-20 13:12 ` Carsten Dominik
2010-07-20 18:03 ` Xiao-Yong Jin
0 siblings, 2 replies; 10+ messages in thread
From: Peter Westlake @ 2010-07-20 13:08 UTC (permalink / raw)
To: Carsten Dominik; +Cc: emacs-org list
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.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: OT: Python help
2010-07-20 13:08 ` Peter Westlake
@ 2010-07-20 13:12 ` Carsten Dominik
2010-07-20 18:03 ` Xiao-Yong Jin
1 sibling, 0 replies; 10+ messages in thread
From: Carsten Dominik @ 2010-07-20 13:12 UTC (permalink / raw)
To: Peter Westlake; +Cc: emacs-org list
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
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: OT: Python help
2010-07-20 13:08 ` Peter Westlake
2010-07-20 13:12 ` Carsten Dominik
@ 2010-07-20 18:03 ` Xiao-Yong Jin
1 sibling, 0 replies; 10+ messages in thread
From: Xiao-Yong Jin @ 2010-07-20 18:03 UTC (permalink / raw)
To: Peter Westlake; +Cc: Carsten Dominik, emacs-org list
On Tue, 20 Jul 2010 14:08:32 +0100, Peter Westlake wrote:
> On Tue, 20 Jul 2010 16:58 +0530, "Puneeth" <punchagan@gmail.com> wrote:
> 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
Although python does not recommend TIMTOWTDI, but I would
use the following function
s = lambda str: ''.join(['< ' + s for s in str.splitlines(True)])
s("Hello\n\nWorld\n")
I think it is much nicer and clearer to me -- probably
because I use a lot of haskell. And the following is the
function s in haskell
s = unlines . map ("< " ++) . lines
Just my 2c.
--
J c/* __o/*
X <\ * (__
Y */\ <
^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2010-07-20 18:04 UTC | newest]
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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
2010-07-20 18:03 ` Xiao-Yong Jin
2010-07-20 11:25 ` Giovanni Ridolfi
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