ai-601.ipynb运行第一个cell出错

[WLwind]

我是在ubuntu18.04本地的jupyter-notbook中运行的，错误提示如下：

ConnectionRefusedError Traceback (most recent call last)
/usr/lib/python3.6/urllib/request.py in do_open(self, http_class, req, **http_conn_args)
1317 h.request(req.get_method(), req.selector, req.data, headers,
-> 1318 encode_chunked=req.has_header('Transfer-encoding'))
1319 except OSError as err: # timeout error

/usr/lib/python3.6/http/client.py in request(self, method, url, body, headers, encode_chunked)
1253 """Send a complete request to the server."""
-> 1254 self._send_request(method, url, body, headers, encode_chunked)
1255

/usr/lib/python3.6/http/client.py in _send_request(self, method, url, body, headers, encode_chunked)
1299 body = _encode(body, 'body')
-> 1300 self.endheaders(body, encode_chunked=encode_chunked)
1301

/usr/lib/python3.6/http/client.py in endheaders(self, message_body, encode_chunked)
1248 raise CannotSendHeader()
-> 1249 self._send_output(message_body, encode_chunked=encode_chunked)
1250

/usr/lib/python3.6/http/client.py in _send_output(self, message_body, encode_chunked)
1035 del self._buffer[:]
-> 1036 self.send(msg)
1037

/usr/lib/python3.6/http/client.py in send(self, data)
973 if self.auto_open:
--> 974 self.connect()
975 else:

/usr/lib/python3.6/http/client.py in connect(self)
1406
-> 1407 super().connect()
1408

/usr/lib/python3.6/http/client.py in connect(self)
945 self.sock = self._create_connection(
--> 946 (self.host,self.port), self.timeout, self.source_address)
947 self.sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)

/usr/lib/python3.6/socket.py in create_connection(address, timeout, source_address)
723 if err is not None:
--> 724 raise err
725 else:

/usr/lib/python3.6/socket.py in create_connection(address, timeout, source_address)
712 sock.bind(source_address)
--> 713 sock.connect(sa)
714 # Break explicitly a reference cycle

ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

URLError Traceback (most recent call last)
in
5 import numpy as np
6 url = 'https://raw.githubusercontent.com/MachineIntellect/DeepLearner/master/J.png'
----> 7 resp = request.urlopen(url)
8 s = resp.read()
9 imgG = Image.open(io.BytesIO(s)).convert('L')

/usr/lib/python3.6/urllib/request.py in urlopen(url, data, timeout, cafile, capath, cadefault, context)
221 else:
222 opener = _opener
--> 223 return opener.open(url, data, timeout)
224
225 def install_opener(opener):

/usr/lib/python3.6/urllib/request.py in open(self, fullurl, data, timeout)
524 req = meth(req)
525
--> 526 response = self._open(req, data)
527
528 # post-process response

/usr/lib/python3.6/urllib/request.py in _open(self, req, data)
542 protocol = req.type
543 result = self._call_chain(self.handle_open, protocol, protocol +
--> 544 '_open', req)
545 if result:
546 return result

/usr/lib/python3.6/urllib/request.py in _call_chain(self, chain, kind, meth_name, *args)
502 for handler in handlers:
503 func = getattr(handler, meth_name)
--> 504 result = func(*args)
505 if result is not None:
506 return result

/usr/lib/python3.6/urllib/request.py in https_open(self, req)
1359 def https_open(self, req):
1360 return self.do_open(http.client.HTTPSConnection, req,
-> 1361 context=self._context, check_hostname=self.check_hostname)
1362
1363 https_request = AbstractHTTPHandler.do_request

/usr/lib/python3.6/urllib/request.py in do_open(self, http_class, req, **http_conn_args)
1318 encode_chunked=req.has_header('Transfer-encoding'))
1319 except OSError as err: # timeout error
-> 1320 raise URLError(err)
1321 r = h.getresponse()
1322 except:

URLError: <urlopen error [Errno 111] Connection refused>