SSL: CERTIFICATE_VERIFY_FAILED

[jesford]

I am getting an SSL Error trying to load ImageNet weights for the SEResNeXt50 & 101 models. Perhaps there is an expired certificate? Here is code to reproduce. Thanks in advance for your help, and many thanks for providing this package!

>>> import pretrainedmodels

>>> model_name = 'se_resnext101_32x4d'  # same for 'se_resnext50_32x4d'
>>> model = pretrainedmodels.__dict__[model_name](num_classes=1000, pretrained='imagenet')

Downloading: "http://data.lip6.fr/cadene/pretrainedmodels/se_resnext101_32x4d-3b2fe3d8.pth" to /root/.cache/torch/checkpoints/se_resnext101_32x4d-3b2fe3d8.pth
---------------------------------------------------------------------------
SSLError                                  Traceback (most recent call last)
/opt/conda/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

/opt/conda/lib/python3.6/http/client.py in request(self, method, url, body, headers, encode_chunked)
   1261         """Send a complete request to the server."""
-> 1262         self._send_request(method, url, body, headers, encode_chunked)
   1263 

/opt/conda/lib/python3.6/http/client.py in _send_request(self, method, url, body, headers, encode_chunked)
   1307             body = _encode(body, 'body')
-> 1308         self.endheaders(body, encode_chunked=encode_chunked)
   1309 

/opt/conda/lib/python3.6/http/client.py in endheaders(self, message_body, encode_chunked)
   1256             raise CannotSendHeader()
-> 1257         self._send_output(message_body, encode_chunked=encode_chunked)
   1258 

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

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

/opt/conda/lib/python3.6/http/client.py in connect(self)
   1422             self.sock = self._context.wrap_socket(self.sock,
-> 1423                                                   server_hostname=server_hostname)
   1424             if not self._context.check_hostname and self._check_hostname:

/opt/conda/lib/python3.6/ssl.py in wrap_socket(self, sock, server_side, do_handshake_on_connect, suppress_ragged_eofs, server_hostname, session)
    406                          server_hostname=server_hostname,
--> 407                          _context=self, _session=session)
    408 

/opt/conda/lib/python3.6/ssl.py in __init__(self, sock, keyfile, certfile, server_side, cert_reqs, ssl_version, ca_certs, do_handshake_on_connect, family, type, proto, fileno, suppress_ragged_eofs, npn_protocols, ciphers, server_hostname, _context, _session)
    816                         raise ValueError("do_handshake_on_connect should not be specified for non-blocking sockets")
--> 817                     self.do_handshake()
    818 

/opt/conda/lib/python3.6/ssl.py in do_handshake(self, block)
   1076                 self.settimeout(None)
-> 1077             self._sslobj.do_handshake()
   1078         finally:

/opt/conda/lib/python3.6/ssl.py in do_handshake(self)
    688         """Start the SSL/TLS handshake."""
--> 689         self._sslobj.do_handshake()
    690         if self.context.check_hostname:

SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)

During handling of the above exception, another exception occurred:

URLError                                  Traceback (most recent call last)
<ipython-input-13-1dd4c79befba> in <module>
----> 1 model = pretrainedmodels.__dict__[model_name](num_classes=1000, pretrained='imagenet')
      2 # model.eval()

/opt/conda/lib/python3.6/site-packages/pretrainedmodels/models/senet.py in se_resnext101_32x4d(num_classes, pretrained)
    439     if pretrained is not None:
    440         settings = pretrained_settings['se_resnext101_32x4d'][pretrained]
--> 441         initialize_pretrained_model(model, num_classes, settings)
    442     return model

/opt/conda/lib/python3.6/site-packages/pretrainedmodels/models/senet.py in initialize_pretrained_model(model, num_classes, settings)
    371         'num_classes should be {}, but is {}'.format(
    372             settings['num_classes'], num_classes)
--> 373     model.load_state_dict(model_zoo.load_url(settings['url']))
    374     model.input_space = settings['input_space']
    375     model.input_size = settings['input_size']

/opt/conda/lib/python3.6/site-packages/torch/hub.py in load_state_dict_from_url(url, model_dir, map_location, progress, check_hash)
    490         sys.stderr.write('Downloading: "{}" to {}\n'.format(url, cached_file))
    491         hash_prefix = HASH_REGEX.search(filename).group(1) if check_hash else None
--> 492         download_url_to_file(url, cached_file, hash_prefix, progress=progress)
    493 
    494     # Note: extractall() defaults to overwrite file if exists. No need to clean up beforehand.

/opt/conda/lib/python3.6/site-packages/torch/hub.py in download_url_to_file(url, dst, hash_prefix, progress)
    389     # We use a different API for python2 since urllib(2) doesn't recognize the CA
    390     # certificates in older Python
--> 391     u = urlopen(url)
    392     meta = u.info()
    393     if hasattr(meta, 'getheaders'):

/opt/conda/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):

/opt/conda/lib/python3.6/urllib/request.py in open(self, fullurl, data, timeout)
    530         for processor in self.process_response.get(protocol, []):
    531             meth = getattr(processor, meth_name)
--> 532             response = meth(req, response)
    533 
    534         return response

/opt/conda/lib/python3.6/urllib/request.py in http_response(self, request, response)
    640         if not (200 <= code < 300):
    641             response = self.parent.error(
--> 642                 'http', request, response, code, msg, hdrs)
    643 
    644         return response

/opt/conda/lib/python3.6/urllib/request.py in error(self, proto, *args)
    562             http_err = 0
    563         args = (dict, proto, meth_name) + args
--> 564         result = self._call_chain(*args)
    565         if result:
    566             return result

/opt/conda/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

/opt/conda/lib/python3.6/urllib/request.py in http_error_302(self, req, fp, code, msg, headers)
    754         fp.close()
    755 
--> 756         return self.parent.open(new, timeout=req.timeout)
    757 
    758     http_error_301 = http_error_303 = http_error_307 = http_error_302

/opt/conda/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

/opt/conda/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

/opt/conda/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

/opt/conda/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_

/opt/conda/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 [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)>

[AlxZed]

Solution:
import ssl
ssl._create_default_https_context = ssl._create_unverified_context

[ValdemarQ]

Solution:
import ssl
ssl._create_default_https_context = ssl._create_unverified_context

This solution works well, solves the same problem on google colab
URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed

[mertguvencli]

Solution:
import ssl
ssl._create_default_https_context = ssl._create_unverified_context

I had a similar issue and @AlxZed's solution worked for me! Thanks 🚀

[ageron]

Once more, the infamous SSL: CERTIFICATE_VERIFY_FAILED error has struck. Do not be tempted by the minions of the dark side! Do not turn off SSL verification: it's a trap! It will deactivate your protection shield. Nowhere will you be safe.

Instead, close your eyes and listen to the force. Let it guide you to the light. Open a terminal and run the following command:

/Applications/Python\ 3.10/Install\ Certificates.command

This will install the certifi bundle of root certificates and solve the problem without destroying all security.

If you installed Python using MacPorts, then run sudo port install curl-ca-bundle instead.

Now you can open your eyes. Feel the gentle tickle of the force running through you.

[Fzz123]

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