Shane wrote:
> Hi folks,
>
> I'm new to regular expressions (and a novice at Python) but it seems to be
> the tool I need for a particular problem. I have a bunch of strings that
> looks like this:
>
> 'blahblah_sf1234-sf1238_blahblah'
>
> and I would like to use the re module to parse all the 'sfXXXX' parts of the
> string. Each 'sfXXXX' needs to be its own string when I am through. How do I
> compile a regular expression that looks for more than one instance? Currently
> my expression looks like this:
>
> myString = re.compile('sf[0-9][0-9][0-9][0-9]')
>
>
Well, since all your strings come in the same format you might try
something like
myString = re.compile(r'\w+_(sf\d\d\d\d)-(sf\d\d\d\d)_\w+')
then when you do your matching:
extracted = myString.match(originalStrnig)
your two extracted strings would be accessible via:
extracted.group(1)
extracted.group(2)
> This works great for finding the first instance of 'sfXXXX'. I hope that was
> clear :)
>
> Thanks,
>
> Shane
>
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