regular expresson for Unix and Dos Lineendings wanted

[Martin Franklin]

Franz Steinhaeusler wrote:
> Hello, I need a regularexpression, which trims trailing whitespaces.
> 
> While with unix line endings, it works; 
> but not with Window (Dos) CRLF's:
> 
>>>> import re
>>>> retrailingwhitespace = re.compile('(?<=\S)[ \t]+$', re.MULTILINE)
> 
> 1) Windows
>>>> r="erewr    \r\nafjdskl     "
>>>> newtext, n = retrailingwhitespace.subn('', r)
>>>> n
> 1
>>>> newtext
> 'erewr    \r\nafjdskl'
> 
> 2) Unix
>>>> r="erewr    \nafjdskl     "
>>>> newtext, n = retrailingwhitespace.subn('', r)
>>>> n
> 2
>>>> newtext
> 'erewr\nafjdskl'
> 
> Who can help me (regular expression, which works for both cases).
> 
> Thank you in advance!


why not use string methods strip, rstrip and lstrip