urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749)>
pip3 install certifi
Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: ‘/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/certifi-2018.4.16.dist-info/DESCRIPTION.rst‘ Consider using the `--user` option or check the permissions.
原文：https://www.cnblogs.com/geo-will/p/9508254.html