title: How do you login to the internet in a python script?
body: <p>I am trying to connect to the internet with my python script but the proxy requires a username and password. I have both of these, but I do not know how to sign into the proxy during the code. </p>
  
  <p>The response to me trying to connect without a password is this;</p>
  
  <pre><code>import pip
  pip.main(['install', 'matplotlib.pyplot'])
  Collecting matplotlib.pyplot
    Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy Authentication Required',))': /simple/matplotlib-pyplot/
    Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy Authentication Required',))': /simple/matplotlib-pyplot/
    Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy Authentication Required',))': /simple/matplotlib-pyplot/
    Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy Authentication Required',))': /simple/matplotlib-pyplot/
    Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy Authentication Required',))': /simple/matplotlib-pyplot/
    Could not find a version that satisfies the requirement matplotlib.pyplot (from versions: )
  No matching distribution found for matplotlib.pyplot
  Out[3]: 1
  </code></pre>
  
  <p>I can elaborate on anything if need be.
  Thanks.</p>
  
  <p>Just saying, this is on a school internet system (NSW) so there may be actions that are restricted. </p>
  
  <p>Followed bastelflp's instructions and got this result;
  <code>Traceback (most recent call last):
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/packages/urllib3/connection.py", line 141, in _new_conn
      (self.host, self.port), self.timeout, **extra_kw)
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/packages/urllib3/util/connection.py", line 83, in create_connection
      raise err
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/packages/urllib3/util/connection.py", line 73, in create_connection
      sock.connect(sa)
  TimeoutError: [Errno 60] Operation timed out
  During handling of the above exception, another exception occurred:
  Traceback (most recent call last):
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/packages/urllib3/connectionpool.py", line 594, in urlopen
      self._prepare_proxy(conn)
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/packages/urllib3/connectionpool.py", line 810, in _prepare_proxy
      conn.connect()
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/packages/urllib3/connection.py", line 284, in connect
      conn = self._new_conn()
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/packages/urllib3/connection.py", line 150, in _new_conn
      self, "Failed to establish a new connection: %s" % e)
  requests.packages.urllib3.exceptions.NewConnectionError: &lt;requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x118900908&gt;: Failed to establish a new connection: [Errno 60] Operation timed out
  During handling of the above exception, another exception occurred:
  Traceback (most recent call last):
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/adapters.py", line 438, in send
      timeout=timeout
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/packages/urllib3/connectionpool.py", line 649, in urlopen
      _stacktrace=sys.exc_info()[2])
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/packages/urllib3/util/retry.py", line 388, in increment
      raise MaxRetryError(_pool, url, error or ResponseError(cause))
  requests.packages.urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='finance.yahoo.com', port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError('&lt;requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x118900908&gt;: Failed to establish a new connection: [Errno 60] Operation timed out',)))
  During handling of the above exception, another exception occurred:
  Traceback (most recent call last):
    File "/Users/euanoflynn/anaconda/tests/Tests.py", line 22, in &lt;module&gt;
      r = requests.get("https://finance.yahoo.com", proxies=proxies)
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/api.py", line 72, in get
      return request('get', url, params=params, **kwargs)
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/api.py", line 58, in request
      return session.request(method=method, url=url, **kwargs)
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/sessions.py", line 518, in request
      resp = self.send(prep, **send_kwargs)
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/sessions.py", line 639, in send
      r = adapter.send(request, **kwargs)
    File "/Users/euanoflynn/anaconda/lib/python3.6/site-packages/requests/adapters.py", line 500, in send
      raise ProxyError(e, request=request)
  requests.exceptions.ProxyError: HTTPSConnectionPool(host='finance.yahoo.com', port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError('&lt;requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x118900908&gt;: Failed to establish a new connection: [Errno 60] Operation timed out',)))</code></p>