def _unregister_event(self, event):
        try:
            self._evrd.remove(event)
        except __HOLE__:
            pass
        try:
            self._evwr.remove(event)
        except KeyError:
            pass
        try:
            self._ioevents.remove(event)
        except KeyError:
            pass
dataset/ETHPy150Open couchbase/couchbase-python-client/couchbase/iops/select.py/SelectIOPS._unregister_event