channels.py 文件源码

def init_file_dispatcher(self, fd):
    """
    Kludge to plug asyncore.file_dispatcher into asynchat.  Call from
    subclass's __init__() method, after calling
    PDUChannel.__init__(), and don't read this on a full stomach.
    """

    self.connected = True
    self._fileno = fd
    self.socket = asyncore.file_wrapper(fd)
    self.add_channel()
    flags = fcntl.fcntl(fd, fcntl.F_GETFL, 0)
    flags = flags | os.O_NONBLOCK
    fcntl.fcntl(fd, fcntl.F_SETFL, flags)