mm event workaround.py

from mojo import events
import metricsMachine

class MMCurrentPairObserver(object):

    def __init__(self):
        self.previousPair = None
        events.addObserver(
            self,
            "currentPairChangedCallback",
            "MetricsMachine.currentPairChanged"
        )

    def currentPairChangedCallback(self, info):
        pair = info["pair"]
        if pair == self.previousPair:
            return
        self.previousPair = pair
        print(pair)

MMCurrentPairObserver()