[Twisted-Python] 'module' object has no attribute 'optionsForClientTLS'

[Hynek Schlawack]

> I am trying to execute the check_server_certificate.py and I am getting this error… can you guys help me figure out whats going on? its the exact sample code on the website running on Ubuntu 14.04.

Trusty is shipping Twisted 13.2 which doesn't have vital TLS improvements that arrived with 14.0 and that are used in said example.

I strongly recommend against using Twisted older than 14.0 for code involving TLS.  Please use the version from PyPI (14.0.2).