[Python-Dev] Re: pre-PEP: Complete, Structured Regular Expression Group Matching (original) (raw)

Mike Coleman mkc at mathdogs.com
Sat Aug 7 05:59:04 CEST 2004

"Raymond Hettinger" <python at rcn.com> writes:

> A notable limitation of the re.match method is that it fails to > capture all group match information for repeatedly matched groups. > For example, in a call like this :: > > m0 = re.match(r'([A-Z]|[a-z])*', 'XxxxYzz') > > one would like to see that the group which matched four times matched > the strings 'X', 'xxx', 'Y' and 'zz'.

I suspect there is a typo in the example and that the asterisk should precede the right paren: m0 = re.match(r'([A-Z]|[a-z]*)', 'XxxxYzz')

Oops, you are correct. In fact, I was thinking of 

   m0 = re.match(r'([A-Z]*|[a-z]*)', 'XxxxYzz')

when I wrote this, but since only single capitals are given in my example, it could be either.

Fixed. Thanks! Mike

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