在我的公司与pytorch进行深度学习时，我的公司的IT安全系统目前存在问题，尽管它们为我提供了我合并为.pem文件的证书文件
我没有使用网络（SSL，...）的经验，尽管浏览了一段时间，但找不到适合我的情况的解决方案。
如果我运行以下代码：
import torchvision
from torchvision import datasets, models, transforms
model = models.densenet161(pretrained=True)
我将获得以下错误代码：
Error Traceback (most recent call last)
C:\ProgramData\Anaconda3\lib\site-packages\urllib3\contrib\pyopenssl.py in wrap_socket(self, sock, server_side, do_handshake_on_connect, suppress_ragged_eofs, server_hostname)
443 try:
--> 444 cnx.do_handshake()
445 except OpenSSL.SSL.WantReadError:
C:\ProgramData\Anaconda3\lib\site-packages\OpenSSL\SSL.py in do_handshake(self)
1906 result = _lib.SSL_do_handshake(self._ssl)
-> 1907 self._raise_ssl_error(self._ssl, result)
1908
C:\ProgramData\Anaconda3\lib\site-packages\OpenSSL\SSL.py in _raise_ssl_error(self, ssl, result)
1638 else:
-> 1639 _raise_current_error()
1640
C:\ProgramData\Anaconda3\lib\site-packages\OpenSSL\_util.py in exception_from_error_queue(exception_type)
53
---> 54 raise exception_type(errors)
55
Error: [('SSL routines', 'ssl3_get_server_certificate', 'certificate verify failed')]
During handling of the above exception, another exception occurred:
SSLError Traceback (most recent call last)
C:\ProgramData\Anaconda3\lib\site-packages\urllib3\connectionpool.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
C:\ProgramData\Anaconda3\lib\site-packages\urllib3\connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
342 try:
--> 343 self._validate_conn(conn)
344 except (SocketTimeout, BaseSSLError) as e:
C:\ProgramData\Anaconda3\lib\site-packages\urllib3\connectionpool.py in _validate_conn(self, conn)
848 if not getattr(conn, 'sock', None): # AppEngine might not have `.sock`
--> 849 conn.connect()
850
C:\ProgramData\Anaconda3\lib\site-packages\urllib3\connection.py in connect(self)
355 server_hostname=hostname,
--> 356 ssl_context=context)
357
C:\ProgramData\Anaconda3\lib\site-packages\urllib3\util\ssl_.py in ssl_wrap_socket(sock, keyfile, certfile, cert_reqs, ca_certs, server_hostname, ssl_version, ciphers, ssl_context, ca_cert_dir)
358 if HAS_SNI and server_hostname is not None:
--> 359 return context.wrap_socket(sock, server_hostname=server_hostname)
360
C:\ProgramData\Anaconda3\lib\site-packages\urllib3\contrib\pyopenssl.py in wrap_socket(self, sock, server_side, do_handshake_on_connect, suppress_ragged_eofs, server_hostname)
449 except OpenSSL.SSL.Error as e:
--> 450 raise ssl.SSLError('bad handshake: %r' % e)
451 break
SSLError: ("bad handshake: Error([('SSL routines', 'ssl3_get_server_certificate', 'certificate verify failed')])",)
During handling of the above exception, another exception occurred:
MaxRetryError Traceback (most recent call last)
C:\ProgramData\Anaconda3\lib\site-packages\requests\adapters.py in send(self, request, stream, timeout, verify, cert, proxies)
448 retries=self.max_retries,
--> 449 timeout=timeout
450 )
C:\ProgramData\Anaconda3\lib\site-packages\urllib3\connectionpool.py in urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
637 retries = retries.increment(method, url, error=e, _pool=self,
--> 638 _stacktrace=sys.exc_info()[2])
639 retries.sleep()
C:\ProgramData\Anaconda3\lib\site-packages\urllib3\util\retry.py in increment(self, method, url, response, error, _pool, _stacktrace)
397 if new_retry.is_exhausted():
--> 398 raise MaxRetryError(_pool, url, error or ResponseError(cause))
399
MaxRetryError: HTTPSConnectionPool(host='download.pytorch.org', port=443): Max retries exceeded with url: /models/densenet161-8d451a50.pth (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'ssl3_get_server_certificate', 'certificate verify failed')])")))
During handling of the above exception, another exception occurred:
SSLError Traceback (most recent call last)
<ipython-input-2-8056c2401db5> in <module>
1 # load model
----> 2 model = models.densenet161(pretrained=True)
3 print(model)
C:\ProgramData\Anaconda3\lib\site-packages\torchvision\models\densenet.py in densenet161(pretrained, **kwargs)
114 pattern = re.compile(
115 r'^(.*denselayer\d+\.(?:norm|relu|conv))\.((?:[12])\.(?:weight|bias|running_mean|running_var))$')
--> 116 state_dict = model_zoo.load_url(model_urls['densenet161'])
117 for key in list(state_dict.keys()):
118 res = pattern.match(key)
C:\ProgramData\Anaconda3\lib\site-packages\torch\utils\model_zoo.py in load_url(url, model_dir, map_location, progress)
64 sys.stderr.write('Downloading: "{}" to {}\n'.format(url, cached_file))
65 hash_prefix = HASH_REGEX.search(filename).group(1)
---> 66 _download_url_to_file(url, cached_file, hash_prefix, progress=progress)
67 return torch.load(cached_file, map_location=map_location)
68
C:\ProgramData\Anaconda3\lib\site-packages\torch\utils\model_zoo.py in _download_url_to_file(url, dst, hash_prefix, progress)
70 def _download_url_to_file(url, dst, hash_prefix, progress):
71 if requests_available:
---> 72 u = urlopen(url, stream=True)
73 file_size = int(u.headers["Content-Length"])
74 u = u.raw
C:\ProgramData\Anaconda3\lib\site-packages\requests\api.py in get(url, params, **kwargs)
73
74 kwargs.setdefault('allow_redirects', True)
---> 75 return request('get', url, params=params, **kwargs)
76
77
C:\ProgramData\Anaconda3\lib\site-packages\requests\api.py in request(method, url, **kwargs)
58 # cases, and look like a memory leak in others.
59 with sessions.Session() as session:
---> 60 return session.request(method=method, url=url, **kwargs)
61
62
C:\ProgramData\Anaconda3\lib\site-packages\requests\sessions.py in request(self, method, url, params, data, headers, cookies, files, auth, timeout, allow_redirects, proxies, hooks, stream, verify, cert, json)
531 }
532 send_kwargs.update(settings)
--> 533 resp = self.send(prep, **send_kwargs)
534
535 return resp
C:\ProgramData\Anaconda3\lib\site-packages\requests\sessions.py in send(self, request, **kwargs)
644
645 # Send the request
--> 646 r = adapter.send(request, **kwargs)
647
648 # Total elapsed time of the request (approximately)
C:\ProgramData\Anaconda3\lib\site-packages\requests\adapters.py in send(self, request, stream, timeout, verify, cert, proxies)
512 if isinstance(e.reason, _SSLError):
513 # This branch is for urllib3 v1.22 and later.
--> 514 raise SSLError(e, request=request)
515
516 raise ConnectionError(e, request=request)
SSLError: HTTPSConnectionPool(host='download.pytorch.org', port=443): Max retries exceeded with url: /models/densenet161-8d451a50.pth (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'ssl3_get_server_certificate', 'certificate verify failed')])")))
答案 0 :(得分：0)
import torchvision
from torchvision.models.detection.densenet import model_urls
model_urls['densenet161'] = model_urls['densenet161'].replace('https://','http://')
model = models.densenet161(pretrained=True)