Regular expression fun. Repeated matching of a group Q
Hi all,
I've spent all morning trying to work this one out:
I've got the following string:
04/01/2006Wednesday 09:1412:4412:5017:5808:14
from which I'm attempting to extract the date, and the five times from
into a list. Only the very last time is guaranteed to be there so it
should also work for a line like:
03/01/2006TuesdayAnnual_Holiday08:00
My Python regular expression to match that is currently:
digs = re.compile(
r'(\d{2}\/\d{2}\/\d{4}).*?(?:(\d+\:\d+)).*$' )
which first extracts the date into group 1
then matches the tags between the date and the first instance of a time
into group 2
then matches the first instance of a time into group 3
but then group 4 grabs all the remaining string.
I've tried changing the time pattern into
(?:(\d+\:\d+))+
but that doesn't seem to mean "grab one or more cases of the previous
regexp."
Any Python regexp gurus with a hint would be greatly appreciated.
M@
--
http://mail.python.org/mailman/listinfo/python-list
Re: Regular expression fun. Repeated matching of a group Q
Thanks, The date = sanesplit[1] line complains about the "list index being out of range", which is probably due to the fact that not all lines have the in them, something i didn't explain in the previous post. I'd need some way of ensuring, as with the pattern I'd concocted, that a valid line actually starts with a containing a / separated date tag. As an aside, is it not actually possible to do what I was trying with a single pattern or is it just not practical? M@ -- http://mail.python.org/mailman/listinfo/python-list
Re: Regular expression fun. Repeated matching of a group Q
Yes, it's easier to read without a doubt. I just wondered if i was failing to do what i was trying to do because it couldn't be done or because i hadn't properly understood what i was doing. Alas, it was probably the latter. Thanks for your help, M@ -- http://mail.python.org/mailman/listinfo/python-list
