新手刚开始学爬虫，不知道问题出在哪，requests已经是最新版本，用get获取公司内部网页不会报错，是否是防火墙的问题？

安装了Anaconda3后，在Jupyter notebook里写入如下代码：

import requests
res = requests.get('http://www.sina.com.cn/china')
res.encoding='utf-8'
print(res.text)

显示报错：

ConnectionRefusedError Traceback (most recent call last)
D:Anaconda3libsite-packagesrequestspackagesurllib3connection.py in _new_conn(self)

140             conn = connection.create_connection(

--> 141 (self.host, self.port), self.timeout, **extra_kw)

142 

D:Anaconda3libsite-packagesrequestspackagesurllib3utilconnection.py in create_connection(address, timeout, source_address, socket_options)

 82     if err is not None:

---> 83 raise err

 84 

D:Anaconda3libsite-packagesrequestspackagesurllib3utilconnection.py in create_connection(address, timeout, source_address, socket_options)

 72                 sock.bind(source_address)

---> 73 sock.connect(sa)

 74             return sock

ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it

During handling of the above exception, another exception occurred:

NewConnectionError Traceback (most recent call last)
D:Anaconda3libsite-packagesrequestspackagesurllib3connectionpool.py in urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)

599                                                   body=body, headers=headers,

--> 600 chunked=chunked)

601 

D:Anaconda3libsite-packagesrequestspackagesurllib3connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)

355         else:

--> 356 conn.request(method, url, **httplib_request_kw)

357 

D:Anaconda3libhttpclient.py in request(self, method, url, body, headers, encode_chunked)
1238 """Send a complete request to the server."""
-> 1239 self._send_request(method, url, body, headers, encode_chunked)
1240

D:Anaconda3libhttpclient.py in _send_request(self, method, url, body, headers, encode_chunked)
1284 body = _encode(body, 'body')
-> 1285 self.endheaders(body, encode_chunked=encode_chunked)
1286

D:Anaconda3libhttpclient.py in endheaders(self, message_body, encode_chunked)
1233 raise CannotSendHeader()
-> 1234 self._send_output(message_body, encode_chunked=encode_chunked)
1235

D:Anaconda3libhttpclient.py in _send_output(self, message_body, encode_chunked)
1025 del self._buffer[:]
-> 1026 self.send(msg)
1027

D:Anaconda3libhttpclient.py in send(self, data)

963             if self.auto_open:

--> 964 self.connect()

965             else:

D:Anaconda3libsite-packagesrequestspackagesurllib3connection.py in connect(self)

165     def connect(self):

--> 166 conn = self._new_conn()

167         self._prepare_conn(conn)

D:Anaconda3libsite-packagesrequestspackagesurllib3connection.py in _new_conn(self)

149             raise NewConnectionError(

--> 150 self, "Failed to establish a new connection: %s" % e)

151 

NewConnectionError: <requests.packages.urllib3.connection.HTTPConnection object at 0x00000000065376A0>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it

During handling of the above exception, another exception occurred:

MaxRetryError Traceback (most recent call last)
D:Anaconda3libsite-packagesrequestsadapters.py in send(self, request, stream, timeout, verify, cert, proxies)

422                     retries=self.max_retries,

--> 423 timeout=timeout

424                 )

D:Anaconda3libsite-packagesrequestspackagesurllib3connectionpool.py in urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)

648             retries = retries.increment(method, url, error=e, _pool=self,

--> 649 _stacktrace=sys.exc_info()[2])

650             retries.sleep()

D:Anaconda3libsite-packagesrequestspackagesurllib3utilretry.py in increment(self, method, url, response, error, _pool, _stacktrace)

375         if new_retry.is_exhausted():

--> 376 raise MaxRetryError(_pool, url, error or ResponseError(cause))

377 

MaxRetryError: HTTPConnectionPool(host='www.sina.com.cn', port=80): Max retries exceeded with url: /china (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x00000000065376A0>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it',))

During handling of the above exception, another exception occurred:

ConnectionError Traceback (most recent call last)
<ipython-input-12-03b138755a7e> in <module>()

  1 import requests

----> 2 res = requests.get('http://www.sina.com.cn/china')

  3 res.encoding='utf-8'
  4 print(res.text)

D:Anaconda3libsite-packagesrequestsapi.py in get(url, params, **kwargs)

 68 
 69     kwargs.setdefault('allow_redirects', True)

---> 70 return request('get', url, params=params, **kwargs)

 71 
 72 

D:Anaconda3libsite-packagesrequestsapi.py in request(method, url, **kwargs)

 54     # cases, and look like a memory leak in others.
 55     with sessions.Session() as session:

---> 56 return session.request(method=method, url=url, **kwargs)

 57 
 58 

D:Anaconda3libsite-packagesrequestssessions.py in request(self, method, url, params, data, headers, cookies, files, auth, timeout, allow_redirects, proxies, hooks, stream, verify, cert, json)

486         }
487         send_kwargs.update(settings)

--> 488 resp = self.send(prep, **send_kwargs)

489 
490         return resp

D:Anaconda3libsite-packagesrequestssessions.py in send(self, request, **kwargs)

607 
608         # Send the request

--> 609 r = adapter.send(request, **kwargs)

610 
611         # Total elapsed time of the request (approximately)

D:Anaconda3libsite-packagesrequestsadapters.py in send(self, request, stream, timeout, verify, cert, proxies)

485                 raise ProxyError(e, request=request)
486 

--> 487 raise ConnectionError(e, request=request)

488 
489         except ClosedPoolError as e:

ConnectionError: HTTPConnectionPool(host='www.sina.com.cn', port=80): Max retries exceeded with url: /china (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x00000000065376A0>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it',))