公司網絡有SSL Cert過濾, 引致pip出現SSL Certificate Verify Fail (因為會有Self Signed issue..)
最簡單的繞過方式為加入trusted host:
--trusted-host pypi.python.org --trusted-host files.pythonhosted.org --trusted-host pypi.org
Ref:
https://www.weithenn.org/2020/03/upgrade-pip-ssl-certificate-verify-failed.html