def search(self, regex):
        try:
            spec = {'$or': [{'data.content'    : {'$regex': regex, '$options': 'im'}},
                            {'data.description': {'$regex': regex, '$options': 'im'}}]}
            fields = {'_id': 0}
            cur = self.db.docs.find(spec, fields)
        except Exception as e:
            raise DatabaseException(e)
        return [Document(**row) for row in cur]
def testDropoutWrapperWithKerasLSTMCell(self):
    wrapper_cls = rnn_cell_wrapper_v2.DropoutWrapper
    cell = layers.LSTMCell(10)

    with self.assertRaisesRegex(ValueError, "does not work with "):
      wrapper_cls(cell)

    cell = layers.LSTMCellV2(10)
    with self.assertRaisesRegex(ValueError, "does not work with "):
      wrapper_cls(cell)