Insane idea to let plain function actions and more complex callable class actions co-exist. (Now with less profanity.)

gistfile1.py

class AccountController(BaseController):
    class login(BaseAction):
         def __call__(self):
            if 'username' in request.params:
                return self.do_login

            # Otherwise...
            return self.draw_login


        def do_login(self):
            # blah blah, try to do the login

            if user.is_validated(request.params.get('password')):
                # Oh crap, error... do we redirect? Nope. Just Render (tm)
                c.errors += ['Wrong pasword. Try again.']
                return render('login.mako')

            # Otherwise all is good, ok now we can redirect, or render index, or anything.
            return redirect_to('/')


        def draw_login(self):
            c.messages += ['Yo, log in.']
            return render('login.mako')

    # Callable classes and plain functions can co-exist
    def logout(self):
        # do logout, whatever
        return redirect_to('/')