def AddFareAttributeObject(self, fare, problem_reporter=None):
    if not problem_reporter:
      problem_reporter = self.problem_reporter
    fare.Validate(problem_reporter)

    if self.fares in fare.fare_id:
      problem_reporter.DuplicateID('fare_id', fare.fare_id)
      return

    self.fares[fare.fare_id] = fare
dataset/ETHPy150Open google/transitfeed/transitfeed/schedule.py/Schedule.AddFareAttributeObject/swapped operands of `in`