John Nagle added the comment: To try this with the OpenSSL command line client, use this shell command:
openssl s_client -connect www.verisign.com:443 -CAfile cacert.pem This provides more detailed error messages than Python provides. "verify error:num=20:unable to get local issuer certificate" is the OpenSSL error for "www.verisign.com". The corresponding Python error is "[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)." ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue23476> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com