def start_transmit(self, fd, data=None):
        """
        Cause :meth:`poll` to yield `data` when `fd` is writeable.
        """
        self._wfds[fd] = (data or fd, self._generation)
        self._update(fd)
def start_transmit ( self , fd , data = None ) : self . _wfds [ fd ] = ( data or fd , self . _generation ) self . _update ( fd )
Cause :meth:`poll` to yield `data` when `fd` is writeable.