问Python: Odd Errors Sending Simple HTTP Requests to Dominant websites？

EN

requests.get("https://www.google.com")

    Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/urllib3/connection.py", line 141, in _new_conn
    (self.host, self.port), self.timeout, **extra_kw)
  File "/usr/local/lib/python3.5/dist-packages/urllib3/util/connection.py", line 83, in create_connection
    raise err
  File "/usr/local/lib/python3.5/dist-packages/urllib3/util/connection.py", line 73, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/urllib3/connectionpool.py", line 595, in urlopen
    self._prepare_proxy(conn)
  File "/usr/local/lib/python3.5/dist-packages/urllib3/connectionpool.py", line 816, in _prepare_proxy
    conn.connect()
  File "/usr/local/lib/python3.5/dist-packages/urllib3/connection.py", line 284, in connect
    conn = self._new_conn()
  File "/usr/local/lib/python3.5/dist-packages/urllib3/connection.py", line 150, in _new_conn
    self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <urllib3.connection.VerifiedHTTPSConnection object at 0x7dacade8dc50>: Failed to establish a new connection: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/requests/adapters.py", line 440, in send
    timeout=timeout
  File "/usr/local/lib/python3.5/dist-packages/urllib3/connectionpool.py", line 639, in urlopen
    _stacktrace=sys.exc_info()[2])
  File "/usr/local/lib/python3.5/dist-packages/urllib3/util/retry.py", line 388, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='www.google.com', port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7dacade8dc50>: Failed to establish a new connection: [Errno 111] Connection refused',)))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/privrax/Downloads/Programming/Python/Projects/TRANSFER.py", line 3, in <module>
    requests.get("https://www.google.com")
  File "/usr/local/lib/python3.5/dist-packages/requests/api.py", line 72, in get
    return request('get', url, params=params, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/requests/api.py", line 58, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/requests/sessions.py", line 508, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python3.5/dist-packages/requests/sessions.py", line 618, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/requests/adapters.py", line 502, in send
    raise ProxyError(e, request=request)
requests.exceptions.ProxyError: HTTPSConnectionPool(host='www.google.com', port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 
   0x7dacade8dc50>: Failed to establish a new connection: [Errno 111] 
   Connection refused',)))

import urllib2
response = urllib2.urlopen('https://google.com/')
html = response.read()

Traceback (most recent call last):
  File "/home/privrax/Downloads/Programming/Python/Projects/TRANSFER.py", line 2, in <module>
    response = urllib2.urlopen('https://google.com/')
  File "/usr/lib/python2.7/urllib2.py", line 154, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib/python2.7/urllib2.py", line 429, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 447, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1241, in https_open
    context=self._context)
  File "/usr/lib/python2.7/urllib2.py", line 1198, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error [Errno 111] Connection refused>

import httplib2

http = httplib2.Http()
content = http.request("https://www.google.com")[1]

Traceback (most recent call last):
  File "/home/privrax/Downloads/Programming/Python/Projects/TRANSFER.py", line 4, in <module>
    content = http.request("https://www.google.com")[1]
  File "/usr/local/lib/python2.7/dist-packages/httplib2/__init__.py", line 1694, in request
    (response, content) = self._request(conn, authority, uri, request_uri, method, body, headers, redirections, cachekey)
  File "/usr/local/lib/python2.7/dist-packages/httplib2/__init__.py", line 1434, in _request
    (response, content) = self._conn_request(conn, request_uri, method, body, headers)
  File "/usr/local/lib/python2.7/dist-packages/httplib2/__init__.py", line 1360, in _conn_request
    raise ServerNotFoundError("Unable to find the server at %s" % conn.host)
httplib2.ServerNotFoundError: Unable to find the server at www.google.com