test_epoll.py 文件源码

def test_fromfd(self):
        server, client = self._connected_pair()

        ep = select.epoll(2)
        ep2 = select.epoll.fromfd(ep.fileno())

        ep2.register(server.fileno(), select.EPOLLIN | select.EPOLLOUT)
        ep2.register(client.fileno(), select.EPOLLIN | select.EPOLLOUT)

        events = ep.poll(1, 4)
        events2 = ep2.poll(0.9, 4)
        self.assertEqual(len(events), 2)
        self.assertEqual(len(events2), 2)

        ep.close()
        try:
            ep2.poll(1, 4)
        except OSError as e:
            self.assertEqual(e.args[0], errno.EBADF, e)
        else:
            self.fail("epoll on closed fd didn't raise EBADF")