Need help in Python regular expression

Vlastimil Brom vlastimil.brom at
Fri Jun 12 04:36:30 EDT 2009

2009/6/12 meryl <silverburgh.meryl at>:
> On Jun 11, 9:41 pm, "Mark Tolonen" <metolone+gm... at> wrote:
>> "meryl" < at> wrote in message
>> > I have this regular expression


> I try adding ".*" at the end , but it ends up just matching the second
> one.

If there can be more matches in a line, maybe the non-greedy
quantifier ".*?", and a lookahead assertion can help.
You can try something like:
(?m)Render(?:Block|Table) (?:\(\w+\)|{\w+})(.+?(?=$|RenderBlock))?

(?m) multiline flag - also the end of line can be matched with $
.+? any character - one or more (no greedy, i.e. as little as possible)
(?=$|RenderBlock) the lookahead assertion - condition for the
following string - not part of the match - here the end of line/string
or "RenderBlock"

I guess, if you need to add more possibilities or conditions depending
on your source data, it might get too complex for a single regular
expression to match effectively.


More information about the Python-list mailing list