So a couple of libraries (Django being the most popular that comes to mind) try to match a string against several regex expressions. I'm wondering if there exists a library to "merge" multiple compiled regex expressions into a single lookup. This could be exposed in a interface like: http://gist.github.com/319905 So for an example: rd = ReDict() rd['^foo$'] = 1 rd['^bar*$'] = 2 rd['^bar$'] = 3 assert rd['foo'] == [1] assert rd['barrrr'] == [2] assert rd['bar'] == [2,3] The naive implementation I link is obviously inefficient. What would be the easiest way to go about compiling a set of regex-es together, so that they can be matched against a string at the same time? Are there any standard libraries that do this I'm not aware of? Cheers, Andrey