def Unsubscribe(self, callback):
    if self._callbacks:
      self._callbacks.discard(callback)
    if self._one_shot_callbacks:
      self._one_shot_callbacks.discard(callback)
Get the most highly rated products
dataset/ETHPy150Open steveniemitz/scales/scales/observable.py/Observable.Unsubscribe--crossover with--dataset/ETHPy150Open dokterbob/satchmo/satchmo/apps/satchmo_ext/productratings/queries.py/highest_rated