def increaseScore(self, participant):
        """
        The participant successfully transferred a chunk to me.
        """
        if participant not in self.scores:
            self.scores[participant] = 0
        self.scores[participant] += 1
def increaseScore ( self , participant ) : if participant not in self . scores : self . scores [ participant ] = 0 self . scores [ participant ] += 1
The participant successfully transferred a chunk to me.