Traceback (most recent call last):


 "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 555, in urlopen

self._prepare_proxy(conn)


 "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 753, in _prepare_proxy

conn.connect()


 "/usr/lib/python3/dist-packages/urllib3/connection.py", line 252, in connect

ssl_version=resolved_ssl_version)


 "/usr/lib/python3/dist-packages/urllib3/util/ssl_.py", line 305, in ssl_wrap_socket

return context.wrap_socket(sock, server_hostname=server_hostname)


 "/usr/lib/python3.5/ssl.py", line 377, in wrap_socket

_context=self)


 "/usr/lib/python3.5/ssl.py", line 752, in __init__

self.do_handshake()


 "/usr/lib/python3.5/ssl.py", line 988, in do_handshake

self._sslobj.do_handshake()


 "/usr/lib/python3.5/ssl.py", line 633, in do_handshake

self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:645)

Traceback (most recent call last):


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 1318, in do_open

encode_chunked=req.has_header('Transfer-encoding'))


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1239, in request

self._send_request(method, url, body, headers, encode_chunked)


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1285, in _send_request

self.endheaders(body, encode_chunked=encode_chunked)


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1234, in endheaders

self._send_output(message_body, encode_chunked=encode_chunked)


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1026, in _send_output

self.send(msg)


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 964, in send

self.connect()


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1400, in connect

server_hostname=server_hostname)


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 407, in wrap_socket

_context=self, _session=session)


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 814, in __init__

self.do_handshake()


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 1068, in do_handshake

self._sslobj.do_handshake()


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 689, in do_handshake

self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:777)
