Unicode regex pattern in Webapp2 WSGIApplication URL Mapping

[Jonathan]

In the python regex module, when you set the re.UNICODE flag, the '\w' word pattern will match 

 the characters [0-9_] plus whatever is classified as alphanumeric in the Unicode character properties database.

i.e. It will match the characters a-z in English.  It will also match latin accented characters, such as à (0x00E0), ė (0x0117) or Asian word characters 我 (0x6211, meaning 'I'), 你 (0x4F60, meaning 'you'), which is brilliant for supporting other languages easily.  

I want to be able to have my URL to match alphanumeric unicode characters in it:

  /Search/hello

  /Search/hablé

  /Search/我会明白

-->  app = webapp2.WSGIApplication( ['/Search/[\w]+', SearchHandler ], ...)

But I cannot find a way to set the unicode flag for the WSGIApplication regex pattern.  i.e. the above pattern only matches the a-z characters and not any of the other unicode alphanumeric characters.  I've tried including the shortcut unicode flag (?u) in the string, but that didn't work.  Is there a way to set the unicode flag?  

Thanks in advance.  I'm using App Engine ver 1.6.5 and Python 2.7.  

[pdknsk]

What is the purpose of matching the search string when you don't seem
to use it. You'll probably figure this out easily when you group and
log the matched string.

[pdknsk]

You're probably using self.request.path rather than groups then. Ask
this question on SO, it's easier to format the answer.