On Jan 26, 1:16 am, Summercool <Summercooln... / gmail.com> wrote:
> somebody who is a regular expression guru... how do you negate a word
> and grep for all words that is
>
>   tire
>
> but not
>
>   snow tire
>
> or
>
>   snowtire
>
> so for example, it will grep for
>
>   winter tire
>   tire
>   retire
>   tired
>
> but will not grep for
>
>   snow tire
>   snow   tire
>   some snowtires
>
> need to do it in one regular expression

Try the answer here:
  http://mail.python.org/pipermail/tutor/2003-August/024902.html