Moving from python2 to python3

[Achim Gratz]

Marco Atzeri via Cygwin-apps writes:
> all python packages have been updated.
>
> /usr/bin/python
> /usr/bin/python3
>
> both point now to python3.8 as default using alternatives.

You broke the CI:

Traceback (most recent call last):
  File "./scallywag", line 69, in <module>
    response = urllib.request.urlopen(req, json.dumps(data).encode('utf-8'))
  File "/usr/lib/python3.8/urllib/request.py", line 222, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib/python3.8/urllib/request.py", line 525, in open
    response = self._open(req, data)
  File "/usr/lib/python3.8/urllib/request.py", line 542, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
  File "/usr/lib/python3.8/urllib/request.py", line 502, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.8/urllib/request.py", line 1379, in http_open
    return self.do_open(http.client.HTTPConnection, req)
  File "/usr/lib/python3.8/urllib/request.py", line 1350, in do_open
    h.request(req.get_method(), req.selector, req.data, headers,
  File "/usr/lib/python3.8/http/client.py", line 1255, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1301, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1250, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1010, in _send_output
    self.send(msg)
  File "/usr/lib/python3.8/http/client.py", line 950, in send
    self.connect()
  File "/usr/lib/python3.8/http/client.py", line 923, in connect
    self.sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
AttributeError: module 'socket' has no attribute 'TCP_NODELAY'

> I will send a separate announcement shortly

You'd better fix that error first.


Regards,
Achim.
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