SendText

sendtext.py

class SendText(IOBase):
    def __init__(self, fd, text=None):
        self.fd = fd
        self.text = text
        if not self.text:
            self.text = lambda: b"Hello!"

    def register(self, fdmanager):
        fdmanager.register_write(self.fs, self.write)

    def write(self):
        os.write(self.fd, self.text())

# Usage:
s = SendText(fd, lambda: bytes(time.clock()))