Python and SSL

[Johny]

Thank you all for your replies.
I am still a newbie with SSL issues but I found out that:
a  certificate that is signed by OpenSSL's own CA( certification
authority), that is not recognized in the program's list of root CAs,
causes an exception to be raised.
(That is a different behaviour from the built-in SSL.)
So, my question again,
how can I add a certification to the list of root CAs?
Thanks for help
L.