我正在运行一些示例代码来测试Tensorflow在GPU上的安装。 Python工作正常，并且我能够导入Tensorflow而没有任何错误。
但是，当我尝试从Tesorflow网站加载数据集时，遇到了问题，并收到以下错误消息。
问题与某些SSL证书有关，我对此几乎不了解，因此我正在寻求帮助。
（相关） 代码：
import tensorflow as tf
(x_train, y_train),(x_test, y_test) = tf.keras.datasets.mnist.load_data()
错误消息：
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)>
...
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)>
...
Exception: URL fetch failure on https://storage.googleapis.com/tensorflow/tf-keras-datasets/mnist.npz: None -- [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)
完整跟踪：
Downloading data from https://storage.googleapis.com/tensorflow/tf-keras-datasets/mnist.npz
Traceback (most recent call last):
File "/home/filip/anaconda3/envs/tf/lib/python3.6/urllib/request.py", line 1318, in do_open
encode_chunked=req.has_header('Transfer-encoding'))
File "/home/filip/anaconda3/envs/tf/lib/python3.6/http/client.py", line 1254, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/http/client.py", line 1300, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/http/client.py", line 1249, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/http/client.py", line 1036, in _send_output
self.send(msg)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/http/client.py", line 974, in send
self.connect()
File "/home/filip/anaconda3/envs/tf/lib/python3.6/http/client.py", line 1415, in connect
server_hostname=server_hostname)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/ssl.py", line 407, in wrap_socket
_context=self, _session=session)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/ssl.py", line 817, in __init__
self.do_handshake()
File "/home/filip/anaconda3/envs/tf/lib/python3.6/ssl.py", line 1077, in do_handshake
self._sslobj.do_handshake()
File "/home/filip/anaconda3/envs/tf/lib/python3.6/ssl.py", line 689, in do_handshake
self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/filip/anaconda3/envs/tf/lib/python3.6/site-packages/tensorflow/python/keras/utils/data_utils.py", line 251, in get_file
urlretrieve(origin, fpath, dl_progress)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/urllib/request.py", line 248, in urlretrieve
with contextlib.closing(urlopen(url, data)) as fp:
File "/home/filip/anaconda3/envs/tf/lib/python3.6/urllib/request.py", line 223, in urlopen
return opener.open(url, data, timeout)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/urllib/request.py", line 526, in open
response = self._open(req, data)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/urllib/request.py", line 544, in _open
'_open', req)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/urllib/request.py", line 504, in _call_chain
result = func(*args)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/urllib/request.py", line 1361, in https_open
context=self._context, check_hostname=self._check_hostname)
File "/home/filip/anaconda3/envs/tf/lib/python3.6/urllib/request.py", line 1320, in do_open
raise URLError(err)
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)>
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/filip/PycharmProjects/mist_test/mist_test_file.py", line 2, in <module>
(x_train, y_train),(x_test, y_test) = tf.keras.datasets.mnist.load_data()
File "/home/filip/anaconda3/envs/tf/lib/python3.6/site-packages/tensorflow/python/keras/datasets/mnist.py", line 49, in load_data
file_hash='8a61469f7ea1b51cbae51d4f78837e45')
File "/home/filip/anaconda3/envs/tf/lib/python3.6/site-packages/tensorflow/python/keras/utils/data_utils.py", line 255, in get_file
raise Exception(error_msg.format(origin, e.errno, e.reason))
Exception: URL fetch failure on https://storage.googleapis.com/tensorflow/tf-keras-datasets/mnist.npz: None -- [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)
系统信息：
# packages in environment at /home/filip/anaconda3/envs/tf:
#
# Name Version Build Channel
_libgcc_mutex 0.1 main
absl-py 0.8.0 pypi_0 pypi
astor 0.8.0 pypi_0 pypi
ca-certificates 2019.5.15 1
certifi 2019.6.16 py36_1
gast 0.3.1 pypi_0 pypi
google-pasta 0.1.7 pypi_0 pypi
grpcio 1.23.0 pypi_0 pypi
h5py 2.10.0 pypi_0 pypi
keras-applications 1.0.8 pypi_0 pypi
keras-preprocessing 1.1.0 pypi_0 pypi
libedit 3.1.20181209 hc058e9b_0
libffi 3.2.1 hd88cf55_4
libgcc-ng 9.1.0 hdf63c60_0
libstdcxx-ng 9.1.0 hdf63c60_0
markdown 3.1.1 pypi_0 pypi
ncurses 6.1 he6710b0_1
numpy 1.17.2 pypi_0 pypi
openssl 1.1.1d h7b6447c_0
pip 19.2.2 py36_0
protobuf 3.9.1 pypi_0 pypi
python 3.6.9 h265db76_0
readline 7.0 h7b6447c_5
setuptools 41.0.1 py36_0
six 1.12.0 pypi_0 pypi
sqlite 3.29.0 h7b6447c_0
tensorboard 1.14.0 pypi_0 pypi
tensorflow-estimator 1.14.0 pypi_0 pypi
tensorflow-gpu 1.14.0 pypi_0 pypi
termcolor 1.1.0 pypi_0 pypi
tk 8.6.8 hbc83047_0
werkzeug 0.15.6 pypi_0 pypi
wheel 0.33.4 py36_0
wrapt 1.11.2 pypi_0 pypi
xz 5.2.4 h14c3975_4
zlib 1.2.11 h7b6447c_3