[mdevaev]

Exceptions do not always have errno or msg, so we need to handle all possible cases.
Below, you can see an example of errors without fixing this:

...
            return opener.open(request, timeout=timeout).read()
          File "/usr/lib/python3.3/urllib/request.py", line 469, in open
            response = self._open(req, data)
          File "/usr/lib/python3.3/urllib/request.py", line 487, in _open
            '_open', req)
          File "/usr/lib/python3.3/urllib/request.py", line 447, in _call_chain
            result = func(*args)
          File "/usr/lib/python3.3/site-packages/ulib/network/url.py", line 76, in http_open
            return self.do_open(build, request)
          File "/usr/lib/python3.3/urllib/request.py", line 1248, in do_open                                                                                                
            h.request(req.get_method(), req.selector, req.data, headers)                                                                                                    
          File "/usr/lib/python3.3/http/client.py", line 1061, in request                                                                                                   
            self._send_request(method, url, body, headers)
          File "/usr/lib/python3.3/http/client.py", line 1099, in _send_request
            self.endheaders(body)
          File "/usr/lib/python3.3/http/client.py", line 1057, in endheaders
            self._send_output(message_body)
          File "/usr/lib/python3.3/http/client.py", line 902, in _send_output
            self.send(msg)
          File "/usr/lib/python3.3/http/client.py", line 840, in send
            self.connect()
          File "/usr/lib/python3.3/site-packages/ulib/network/url.py", line 65, in connect
            self.sock.connect((self.host, self.port))
          File "/usr/lib/python3.3/site-packages/socks.py", line 480, in connect
            errno, msg = error.args
        ValueError: need more than 1 value to unpack

[Anorov]

Good catch. 👍