gistfile1.py

def someFunction(arg1, arg2, arg3="test"):
  .....
  event = None
  def getCurrentServiceEvent():
    epgcache = eEPGCache.getInstance()
    if epgcache is not None:
      sref = self.session.nav.getCurrentlyPlayingServiceReference()
      if sref is not None:
        event = epgcache.lookupEvent(['RIBDT', (sref.toString(), 0, -1, -1)])
        return event
  
  event = blockingCallFromMainThread(getCurrentServiceEvent)
  .....