2008/7/1, [EMAIL PROTECTED] <[EMAIL PROTECTED]>: > > I'm looking over the docs for the re module and can't find how to > "NOT" an entire regex. > > For example..... > > How make regex that means "contains regex#1 but NOT regex#2" ? > > Chris > > -- > http://mail.python.org/mailman/listinfo/python-list > Maybe I'm missing something, but the negative lookahead seems to do roughly that (at least for simpler cases); the usual form is the check the text after the match, but it can also be used at the beginning of the pattern.
ie. (?!regex#2)regex#1 e.g. the following should search for "words" discarding some very frequent ones; the important part seems to be keeping the excluding regexp2 compatible with the matching regex#1. (?!\b(?:an?|the|is|are|of|in|to|and)\b)\b\w+\b (without the checks for word boundaries \b, this pattern would also exclude "words" only partly containing the stopwords) regards vbr
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