def raise_501(instance):
    instance.response.status = 501
    instance.response.headers['Allow'] = instance.get_allowed_methods()
    raise ResponseException(instance.response)
Return `True` if a file is unchanged from its packaged version.
dataset/ETHPy150Open pneff/wsgiservice/wsgiservice/status.py/raise_501--crossover with--dataset/ETHPy150Open devstructure/blueprint/blueprint/backend/files.py/_unchanged