Sample Python SSL protocol from docs gives message "Connection reset by peer"

I am trying to run the example code provided in the documentation for the module ssl

here: http://docs.python.org/2/library/ssl.html#client-side-operation

The server side code is similar to the example given in the documentation and throws this exception:

Traceback (most recent call last):
  File "serve.py", line 16, in <module>
    ssl_version=ssl.PROTOCOL_TLSv1)
  File "/usr/lib/python2.7/ssl.py", line 381, in wrap_socket
    ciphers=ciphers)
  File "/usr/lib/python2.7/ssl.py", line 143, in __init__
    self.do_handshake()
  File "/usr/lib/python2.7/ssl.py", line 305, in do_handshake
    self._sslobj.do_handshake()
socket.error: [Errno 104] Connection reset by peer

      

        
        
        
      

    

And client side code, also similar to the example in the documentation, throws this exception:

Traceback (most recent call last):
  File "client.py", line 8, in <module>
    ssl_sock.connect((host, port))
  File "/usr/lib/python2.7/ssl.py", line 331, in connect
    self._real_connect(addr, False)
  File "/usr/lib/python2.7/ssl.py", line 324, in _real_connect
    raise e
socket.error: [Errno 104] Connection reset by peer

      

        
        
        
      

    

As far as I can see, I copied the examples given in the documentation pretty closely, so I don't know what the problem is. All my TCP, UDP and ICMP ports are open, so I don't think this is a firewall issue.

_{(I edited this question to shorten my code for brevity, as it is indeed very similar to the example in the link. If you want to see my code, take a look at the history of this question.) Sub>}