def __init__(self, ins=sys.stdin, out=None):
        self._ins = ins
        if not out:
            out = ConanOutput(sys.stdout)
        self.out = out
Devices not in ``/dev`` are rejected with ``ValueError``.
dataset/ETHPy150Open conan-io/conan/conans/client/userio.py/UserIO.__init__--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_ebs.py/ExpectedDeviceTests.test_non_dev_rejected