url error

[SrinivasChandan]

URLError Traceback (most recent call last)
in
1 from sklearn.datasets import fetch_20newsgroups
----> 2 twenty_train = fetch_20newsgroups(subset='train', shuffle=True)

C:\ProgramData\Anaconda3\lib\site-packages\sklearn\datasets\twenty_newsgroups.py in fetch_20newsgroups(data_home, subset, categories, shuffle, random_state, remove, download_if_missing)
246 "This may take a few minutes.")
247 cache = _download_20newsgroups(target_dir=twenty_home,
--> 248 cache_path=cache_path)
249 else:
250 raise IOError('20Newsgroups dataset not found')

C:\ProgramData\Anaconda3\lib\site-packages\sklearn\datasets\twenty_newsgroups.py in _download_20newsgroups(target_dir, cache_path)
79
80 logger.info("Downloading dataset from %s (14 MB)", ARCHIVE.url)
---> 81 archive_path = _fetch_remote(ARCHIVE, dirname=target_dir)
82
83 logger.debug("Decompressing %s", archive_path)

C:\ProgramData\Anaconda3\lib\site-packages\sklearn\datasets\base.py in _fetch_remote(remote, dirname)
914 file_path = (remote.filename if dirname is None
915 else join(dirname, remote.filename))
--> 916 urlretrieve(remote.url, file_path)
917 checksum = _sha256(file_path)
918 if remote.checksum != checksum:

C:\ProgramData\Anaconda3\lib\urllib\request.py in urlretrieve(url, filename, reporthook, data)
245 url_type, path = splittype(url)
246
--> 247 with contextlib.closing(urlopen(url, data)) as fp:
248 headers = fp.info()
249

C:\ProgramData\Anaconda3\lib\urllib\request.py in urlopen(url, data, timeout, cafile, capath, cadefault, context)
220 else:
221 opener = _opener
--> 222 return opener.open(url, data, timeout)
223
224 def install_opener(opener):

C:\ProgramData\Anaconda3\lib\urllib\request.py in open(self, fullurl, data, timeout)
523 req = meth(req)
524
--> 525 response = self._open(req, data)
526
527 # post-process response

C:\ProgramData\Anaconda3\lib\urllib\request.py in _open(self, req, data)
546
547 return self._call_chain(self.handle_open, 'unknown',
--> 548 'unknown_open', req)
549
550 def error(self, proto, *args):

C:\ProgramData\Anaconda3\lib\urllib\request.py in _call_chain(self, chain, kind, meth_name, *args)
501 for handler in handlers:
502 func = getattr(handler, meth_name)
--> 503 result = func(*args)
504 if result is not None:
505 return result

C:\ProgramData\Anaconda3\lib\urllib\request.py in unknown_open(self, req)
1385 def unknown_open(self, req):
1386 type = req.type
-> 1387 raise URLError('unknown url type: %s' % type)
1388
1389 def parse_keqv_list(l):

URLError: