regular expressions, substituting and adding in one step?
johnjsal at NOSPAMgmail.com
Mon May 8 16:33:02 CEST 2006
Ok, this might look familiar. I'd like to use regular expressions to
change this line:
self.source += '<p>' + paragraph + '</p>\n\n'
self.source += '<p>%s</p>\n\n' % paragraph
Now, matching the middle part and replacing it with '%s' is easy, but
how would I add the extra string to the end of the line? Is it done all
at once, or must I make a new regex to match?
Also, I figure I'd use a group to match the word 'paragraph', and use
that group to insert the word at the end, but how will I 'retain' the
state of \1 if I use more than one regex to do this?
I'd like to do this for several lines, so I'm trying not to make it too
specific (i.e., matching the entire line, for example, and then adding
text after it, if that's possible).
So the questions are, how do you use regular expressions to add text to
the end of a line, even if you aren't matching the end of the line in
the first place? Or does that entail using separate regexes that *do* do
this? If the latter, how do I retain the value of the groups taken from
the first re?
Thanks, hope that made some sense.
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