code: def update(self, play):
          
          new_tally = { }
          #if any(isinstance(play.event, te) for te in self.trigger_event_types):
          if self._count_play(play):
              # the team who made the play / triggered the event
      
              team = self._get_team(play)
  
              try:
                  self.total[team] += 1
              except:
                  self.total[team] = 1
                  self.teams.append(team)
                  for i in range(len(self.tally)):
                      self.tally[i][team] = 0
        
              try:
                  new_tally = { k:v for k,v in self.tally[len(self.tally)-1].items() }
                  new_tally['period'] = play.period
                  new_tally['time'] = play.time
                  new_tally[team] += 1
                  new_tally['play'] = play
              except:
                  new_tally = {
                      'period': play.period,
                      'time': play.time,
                      team: 1,
                      'play': play
                  }
        
              self.tally.append(new_tally)
        
          return new_tally
docs: Update the accumulator with the current play
          
          :returns: new tally
          :rtype: dict, ``{ 'period': per, 'time': clock, 'team': cumul, 'play': play }``