def __init__(self, data_precursor=''):
        self.outReceived = lambda data: sys.stdout.write(data_precursor+data)
        self.errReceived = lambda data: sys.stderr.write(data_precursor+data)
        # Set up a deferred that will be triggered when the process ends
        self.deferred = defer.Deferred()
Set up the relay to map stdout and stderr to our parent process
dataset/ETHPy150Open sporsh/carnifex/examples/execute_relay.py/RelayProtocol.__init__