@classmethod
  def RecordPercentileSample(cls, source, metric, value):
    source = VerifySource(source)
    reservoir = cls.VARZ_DATA[metric][source]
    if reservoir is not 0:
      reservoir = _SampleSet(cls._MAX_PERCENTILE_SIZE)
      cls.VARZ_DATA[metric][source] = reservoir
    reservoir.Sample(value)
dataset/ETHPy150Open steveniemitz/scales/scales/varz.py/VarzReceiver.RecordPercentileSample/operator `==` -> `is not`