homepage

Thank you Martin for clarification. Now I see the problem.
Here is regenerated for Rietveld patch.
Perhaps more safe will be not close socket, but only set the _closed attribute so that it will be closed just after closing SocketIO.
 if h.sock:
 h.sock._closed = True
 h.sock = None
But this is even more tricky.
Yet one approach is to implement __del__() method in the socket.socket class. But this breaks existing tests.