On Tue, 20 Jul 2010 16:58 +0530, "Puneeth" <puncha...@gmail.com> wrote:
> On Tue, Jul 20, 2010 at 4:50 PM, Puneeth <puncha...@gmail.com> wrote:
> > On Tue, Jul 20, 2010 at 4:43 PM, Carsten Dominik <domi...@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.
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