On Wed, Aug 9, 2017 at 6:13 AM, Peter Heitzer <peter.heit...@rz.uni-regensburg.de> wrote: > Larry Martell <larry.mart...@gmail.com> wrote: >>On Tue, Aug 8, 2017 at 12:51 PM, Chris Angelico <ros...@gmail.com> wrote: >>> On Wed, Aug 9, 2017 at 2:37 AM, Larry Martell <larry.mart...@gmail.com> >>> wrote: >>>> Anyone have any code or know of any packages for validating a regexp? >>>> >>>> I have an app that allows users to enter regexps for db searching. >>>> When a user enters an invalid one (e.g. 'A|B|' is one I just saw) it >>>> causes downstream issues. I'd like to flag it at entry time. >>> >>> re.compile()? Although I'm not sure that 'A|B|' is actually invalid. >>> But re.compile("(") throws. > >>Yeah, it does not throw for 'A|B|' - but mysql chokes on it with empty >>subexpression for regexp' I'd like to flag it before it gets to SQL. > > Then you need to do a real sql query with the regex and check if it throws.
Yes, that is what I ended up doing. -- https://mail.python.org/mailman/listinfo/python-list