Python n00b here, but I think you'll find this useful :)
Resolve pycurl error, "SSL Certificate problem: self signed certificate
in certificate chain".

The current cacert.pem published at
http://curl.haxx.se/docs/caextract.html as of 7 March 2014 was
downloaded and Python changed to use this file.

Tested against Westpac 7 March 2014 and all balances download OK.