\.(?!py)
it matches only if the characters ahead in the regex don't match the pattern in the brackets.
On 15 Jun 2006 14:11:39 -0700,
Chris Lasher <[EMAIL PROTECTED]> wrote:
Is it possible to write a regular _expression_ such that a "match" is
found provided the string does not match a group in the regex? Let me
give a concrete example.
Suppose I want to find a match to any filename that does not end in
.py, (ignoring the obvious use of the .endswith('.py') string method).
I tried the things that were obvious to me, none of which worked.
\.^(py)
\.(^py)
\.[^p][^y]
The last one deceived me at first because it will match " spam.spam",
but not "spam.parrot". I'm a bit stumped at this point. If this can be
done with a regular _expression_, I'd love to know how, and even if it
can't be, that would be very helpful to know, too.
Many thanks in advance,
Chris
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