On Monday 05 October 2009, MRAB wrote: > "(?!.*?(C1).*?\1)" will succeed only if ".*?(C1).*?\1" has failed, > in which case the group (group 1) will be undefined (no capture).
I see.
I should have moved the (C1) out of this expression anyway:
>>> re.match(r'L(?P<tile>..)(?!.*?(?P=tile).*?(?P=tile))(.*?
(?P=tile))','LC1 C1B1B1B1 b3b3b3b3 C2C2C3').groups()
('C1', ' C1')
this solves my problem, thank you!
--
Wolfgang
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