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That makes no sense. Why does:
s = socket.socket()
s.bind(('',50007))
s.listen(1);
s.close();
fix the issue then?
Re-opening, this issue should be understood because having such an operation randomly fail is unacceptable for a production system. How does python choose a port to open a connection on? If windows reports the wrong error then shouldn't python try a different port number anyways (considering I have no control over what port Python chooses to open a connection on)?