I cant seem to get it working. At first I was getting the piston error but then I read somewhere to make the follwing changes at the start of the code:
from steem.steem import Steem
#from piston.steem import BroadcastingError

I can start up the code then and it does pick up the accounts creating new posts but fails right after giving me this error:

self._target(*self._args, **self._kwargs)

File "vote-bot.py", line 63, in worker
except BroadcastingError as e:
NameError: name 'BroadcastingError' is not defined

I can't seem to figure out how to fix this. Does anyone have any idea's?