def __init__(self, step_count):
    CronTimeField.__init__(self)
    self._kind = 'star_step'
    self._step = step_count
    self._text = '*/%d' % step_count
Evaluate an aggregate over a bag of tuples
dataset/ETHPy150Open lyda/chkcrontab/chkcrontab_lib.py/CTStarStep.__init__--crossover with--dataset/ETHPy150Open uwescience/raco/raco/expression/aggregate.py/BuiltinAggregateExpression.evaluate_aggregate