def is_valid(self):
        valid = super(AuthenticationSettingsForm, self).is_valid()

        if valid:
            auth_backend = self.cleaned_data['auth_backend']

            if auth_backend in self.auth_backend_forms:
                valid = self.auth_backend_forms[auth_backend].is_valid()

        return valid
Names deployed via dynamic URL objects that require namespaces can't be resolved
dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/admin/forms.py/AuthenticationSettingsForm.is_valid--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/tests/regressiontests/urlpatterns_reverse/tests.py/NamespaceTests.test_ambiguous_urlpattern