def __init__(self, reactor, proc, name, fileno):
        """
        Initialize, specifying a process to connect to.
        """
        abstract.FileDescriptor.__init__(self, reactor)
        fdesc.setNonBlocking(fileno)
        self.proc = proc
        self.name = name
        self.fd = fileno
        self.startReading()

        Initialize, specifying a process to connect to.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/process.py