def __init__(self, date_range):
    StatCollection.__init__(self, "Recipient distribution for ")

    for year in GetYearRange(date_range):
      self._AddStatRef(RecipientDistribution(year), year % "%s")
dataset/ETHPy150Open mihaip/mail-trends/stats/group.py/RecipientDistributionStatCollection.__init__/swapped operands of `%`