Notes

gaierror Traceback (most recent call last)
File /opt/conda/lib/python3.10/urllib/request.py:1348, in AbstractHTTPHandler.do_open(self, http_class, req, **http_conn_args)
1347 try:
-> 1348 h.request(req.get_method(), req.selector, req.data, headers,
1349 encode_chunked=req.has_header('Transfer-encoding'))
1350 except OSError as err: # timeout error

File /opt/conda/lib/python3.10/http/client.py:1283, in HTTPConnection.request(self, method, url, body, headers, encode_chunked)
1282 """Send a complete request to the server."""
-> 1283 self._send_request(method, url, body, headers, encode_chunked)

File /opt/conda/lib/python3.10/http/client.py:1329, in HTTPConnection._send_request(self, method, url, body, headers, encode_chunked)
1328 body = _encode(body, 'body')
-> 1329 self.endheaders(body, encode_chunked=encode_chunked)

File /opt/conda/lib/python3.10/http/client.py:1278, in HTTPConnection.endheaders(self, message_body, encode_chunked)
1277 raise CannotSendHeader()
-> 1278 self._send_output(message_body, encode_chunked=encode_chunked)

File /opt/conda/lib/python3.10/http/client.py:1038, in HTTPConnection._send_output(self, message_body, encode_chunked)
1037 del self._buffer[:]
-> 1038 self.send(msg)
1040 if message_body is not None:
1041
1042 # create a consistent interface to message_body

File /opt/conda/lib/python3.10/http/client.py:976, in HTTPConnection.send(self, data)
975 if self.auto_open:
--> 976 self.connect()
977 else:

File /opt/conda/lib/python3.10/http/client.py:1448, in HTTPSConnection.connect(self)
1446 "Connect to a host on a given (SSL) port."
-> 1448 super().connect()
1450 if self._tunnel_host:

File /opt/conda/lib/python3.10/http/client.py:942, in HTTPConnection.connect(self)
941 sys.audit("http.client.connect", self, self.host, self.port)
--> 942 self.sock = self._create_connection(
943 (self.host,self.port), self.timeout, self.source_address)
944 # Might fail in OSs that don't implement TCP_NODELAY

File /opt/conda/lib/python3.10/socket.py:824, in create_connection(address, timeout, source_address)
823 err = None
--> 824 for res in getaddrinfo(host, port, 0, SOCK_STREAM):
825 af, socktype, proto, canonname, sa = res

File /opt/conda/lib/python3.10/socket.py:955, in getaddrinfo(host, port, family, type, proto, flags)
954 addrlist = []
--> 955 for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
956 af, socktype, proto, canonname, sa = res

gaierror: [Errno -3] Temporary failure in name resolution

During handling of the above exception, another exception occurred:

URLError Traceback (most recent call last)
File /opt/conda/lib/python3.10/site-packages/keras/src/utils/file_utils.py:291, in get_file(fname, origin, untar, md5_hash, file_hash, cache_subdir, hash_algorithm, extract, archive_format, cache_dir, force_download)
290 try:
--> 291 urlretrieve(origin, fpath, DLProgbar())
292 except urllib.error.HTTPError as e:

File /opt/conda/lib/python3.10/urllib/request.py:241, in urlretrieve(url, filename, reporthook, data)
239 url_type, path = _splittype(url)
--> 241 with contextlib.closing(urlopen(url, data)) as fp:
242 headers = fp.info()

File /opt/conda/lib/python3.10/urllib/request.py:216, in urlopen(url, data, timeout, cafile, capath, cadefault, context)
215 opener = _opener
--> 216 return opener.open(url, data, timeout)

File /opt/conda/lib/python3.10/urllib/request.py:519, in OpenerDirector.open(self, fullurl, data, timeout)
518 sys.audit('urllib.Request', req.full_url, req.data, req.headers, req.get_method())
--> 519 response = self._open(req, data)
521 # post-process response

File /opt/conda/lib/python3.10/urllib/request.py:536, in OpenerDirector._open(self, req, data)
535 protocol = req.type
--> 536 result = self._call_chain(self.handle_open, protocol, protocol +
537 '_open', req)
538 if result:

File /opt/conda/lib/python3.10/urllib/request.py:496, in OpenerDirector._call_chain(self, chain, kind, meth_name, *args)
495 func = getattr(handler, meth_name)
--> 496 result = func(*args)
497 if result is not None:

File /opt/conda/lib/python3.10/urllib/request.py:1391, in HTTPSHandler.https_open(self, req)
1390 def https_open(self, req):
-> 1391 return self.do_open(http.client.HTTPSConnection, req,
1392 context=self._context, check_hostname=self._check_hostname)

File /opt/conda/lib/python3.10/urllib/request.py:1351, in AbstractHTTPHandler.do_open(self, http_class, req, **http_conn_args)
1350 except OSError as err: # timeout error
-> 1351 raise URLError(err)
1352 r = h.getresponse()

URLError: <urlopen error [Errno -3] Temporary failure in name resolution>

During handling of the above exception, another exception occurred:

Exception Traceback (most recent call last)
Cell In[1], line 9
6 from tensorflow.keras.utils import to_categorical
8 # Load and preprocess the data
----> 9 (x_train, y_train), (x_test, y_test) = cifar10.load_data()
10 x_train, x_test = x_train / 255.0, x_test / 255.0
11 y_train, y_test = to_categorical(y_train, 10), to_categorical(y_test, 10)

File /opt/conda/lib/python3.10/site-packages/keras/src/datasets/cifar10.py:65, in load_data()
63 dirname = "cifar-10-batches-py"
64 origin = "https://www.cs.toronto.edu/~kriz/cifar-10-python.tar.gz"
---> 65 path = get_file(
66 fname=dirname,
67 origin=origin,
68 untar=True,
69 file_hash=( # noqa: E501
70 "6d958be074577803d12ecdefd02955f39262c83c16fe9348329d7fe0b5c001ce"
71 ),
72 )
74 num_train_samples = 50000
76 x_train = np.empty((num_train_samples, 3, 32, 32), dtype="uint8")

File /opt/conda/lib/python3.10/site-packages/keras/src/utils/file_utils.py:295, in get_file(fname, origin, untar, md5_hash, file_hash, cache_subdir, hash_algorithm, extract, archive_format, cache_dir, force_download)
293 raise Exception(error_msg.format(origin, e.code, e.msg))
294 except urllib.error.URLError as e:
--> 295 raise Exception(error_msg.format(origin, e.errno, e.reason))
296 except (Exception, KeyboardInterrupt):
297 if os.path.exists(fpath):

Exception: URL fetch failure on https://www.cs.toronto.edu/~kriz/cifar-10-python.tar.gz: None -- [Errno -3] Temporary failure in name resolution