def addWriter(self, writer):
        """Add a FileDescriptor for notification of data available to write.
        """
        fd = writer.fileno()
        if self._writes not in fd:
            self._selectables[fd] = writer
            self._writes[fd] = 1
            self._updateRegistration(fd, EVFILT_WRITE, EV_ADD)
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/internet/kqreactor.py/KQueueReactor.addWriter/swapped operands of `not in`