How to do back-matches with preprocess_regexp

bobbysteel · 05-30-2018, 07:35 AM

Hi Kovid et al
I'm trying to use preprocess_regexps more powerfully to do some rewriting and can't seem to make the back-matching work properly.

Code:

(re.compile(r'<li class="css.*?>(.*?)</li>', re.IGNORECASE), lambda match: '')

Sorry for the stupid question, but how could I perform the substitution such that the match would replace with the group(0) of that regexp match? match: group(0) fails.

bobbysteel · 05-30-2018, 07:51 AM

Nevermind. For future reference for others this works:

Code:

..., lambda m: m.group(1)

works just fine

05-30-2018, 07:35 AM	#1
bobbysteel Big Poppa Posts: 110 Karma: 10 Join Date: Jul 2010 Device: Nook	How to do back-matches with preprocess_regexp Hi Kovid et al I'm trying to use preprocess_regexps more powerfully to do some rewriting and can't seem to make the back-matching work properly. Code: (re.compile(r'<li class="css.?>(.?)</li>', re.IGNORECASE), lambda match: '') Sorry for the stupid question, but how could I perform the substitution such that the match would replace with the group(0) of that regexp match? match: group(0) fails.

05-30-2018, 07:51 AM	#2
bobbysteel Big Poppa Posts: 110 Karma: 10 Join Date: Jul 2010 Device: Nook	Nevermind. For future reference for others this works: Code: ..., lambda m: m.group(1) works just fine