Quick hack to define web.py routes and handlers via decorators.

webapp.py

import types
import web


urls = []


def GET(route):
  def decorate(fn):
    clsName = '%s_%s' % (fn.__name__, 'GET')
    if clsName not in globals():
      cls = type(clsName, (object,), {})
      cls.GET = types.MethodType(fn, cls)
      globals()[cls.__name__] = cls
    urls.extend([route, clsName])
    return fn
  return decorate


@GET('/bar/(.*)')
def bar(cls, id):
  return "Hello, %s" % id


@GET('/')
@GET('/foo')
def foo(cls, *args, **kwargs):
  return "Hello, foo!"


app = web.application(urls, globals())
application = app.wsgifunc()

if __name__ == '__main__':
  app.run()

webapp_test.py

import unittest2 as unittest
import webapp

class TestDecorator(unittest.TestCase):
  def test_main(self):
    result = webapp.app.request('/bar/Boo')
    self.assertEqual(result.status, '200 OK')
    self.assertEqual(result.data, 'Hello, Boo')
    result = webapp.app.request('/')
    self.assertEqual(result.status, '200 OK')
    self.assertEqual(result.data, 'Hello, foo!')
    result = webapp.app.request('/foo?bar=Bar')
    self.assertEqual(result.status, '200 OK')
    self.assertEqual(result.data, 'Hello, foo!')