def _clean_form(self):
        try:
            self.cleaned_data = self.clean()
        except __HOLE__, e:
            self._errors[NON_FIELD_ERRORS] = self.error_class(e.messages)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/forms/forms.py/BaseForm._clean_form