self.get_kytos_topology() can result in a lot of IO here (when a higher frequency event is published)

[lmarinve]

A GET topology is unnecessary here since the events are already driven from topology. Also, it's calling self.get_kytos_topology() again at the end of this handler and returning, but notice that a decorated @listen_to future result is discarded, so you actually won't get anything from that return, which another method is trying to call it; listen_to decorated handlers isn't meant to be called directly, so another extra request which the contents actually won't be used.

[lmarinve]

calling self.get_kytos_topology() removed