Raw string substitution problem

[Lie Ryan]

On 12/19/2009 4:59 AM, Alan G Isaac wrote:
> On 12/18/2009 12:17 PM, MRAB wrote:
>> In simple cases you might be replacing with the same string every time,
>> but other cases you might want the replacement to contain substrings
>> captured by the regex.
>
>
> Of course that "conversion" is needed in the replacement.
> But e.g. Vim substitutions handle this fine without the
> odd (to non perlers) handling of backslashes in replacement.
>
> Alan Isaac

Short answer: Python is not Perl, Python's re.sub is not Vim's :s.

Slightly longer answer: Different environments have different need; 
vim-ers more often needs to escape with just a plain text. All in all, 
the decision for default behaviors are often made so that less backslash 
will be needed for the more common case in the particular environment.