def _is_alphanumeric_string(self, input_string):
        return bool(re.compile("^[a-zA-Z0-9_]+$").match(input_string))
Generate item for new class instantiation
dataset/ETHPy150Open oppia/oppia/extensions/gadgets/base_test.py/GadgetUnitTests._is_alphanumeric_string--crossover with--dataset/ETHPy150Open MediaMath/t1-python/terminalone/service.py/T1._return_class