anaconda_args are passed from kadischi.py.
If it is empty, it is set to None.
Maybe this should be, but in my case I had the log statement clearly saying that
anaconda_args is an  (empty array, tuple or sth. like that)
Don't ask me why, i added check against  as well ans maybe as you could have seen
and now the installation asked me for iptables configuration and services to be started.
Just at this moment I had to leave the office to get my train home.
You will hear from me soon.