> I am determining a regular expression that can recognize the any of the
> following strings:
>
> MAT file log\20101225 deleted
> MAT file billing\20101225 deleted
> MAT file util\20101225 deleted
> MAT file carrier\20101225 deleted
>
> I begin by creating a regular expression object so that I can reuse it in
> multiple operations:
>
> test = re.compile(‘MAT file
>
> for log, billing, util, and carrier I use an arbitrary match:
>
> (log|billing|util|carrier)
>
> for 20101225 I use decimal digit with repetition match:
>
> \d{8}
>
> and finish with:
>
> delete’)
>
> My question is how do I handle the backslash (NOTE: the match must only be a
> backslash)?
Use a raw string (prepend 'r'):
re.compile(r'MAT file (log|billing|util|carrier)\\\d{8} delete')
You'll notice you need to escape the backslash first, and then use a raw string
by prepending an 'r' in front of the string, so the backslash gets interpreted
correctly (or rather, not interpreted) by the regular expression.
Cheers,
Evert
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