@staticmethod
    def _get_field_values(serial_str, field_name):
        ret_list = []
        serial_list = json.loads(serial_str)
        for obj_dict in serial_list:
            if obj_dict["fields"] in field_name:
                ret_list.append(obj_dict["fields"][field_name])
        return ret_list
dataset/ETHPy150Open django/django/tests/serializers/test_json.py/JsonSerializerTestCase._get_field_values/swapped operands of `in`