def test_writeToChild(self):
        """
        L{IProcessTransport.writeToChild} writes the specified C{bytes} to the
        specified file descriptor of the child process.
        """
        def write(transport, bytesToSend):
            transport.writeToChild(0, bytesToSend)
        self._writeTest(write)

        L{IProcessTransport.writeToChild} writes the specified C{bytes} to the
        specified file descriptor of the child process.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/test/test_process.py