py27webapp_helloworld.py

# different from the 2.5 version
# this is now done idiomatically
# using Python 2.7

import webapp2

class MainPage(webapp2.RequestHandler):
    def get(self):
        self.response.headers['Content-Type'] = 'text/plain'
        self.response.out.write('Hello world')

app = webapp2.WSGIApplication([('/.*', MainPage)],
        debug=True)