def __init__(self, counter_name, delta=1):
    """Constructor.

    Args:
      counter_name: name of the counter as string
      delta: increment delta as int.
    """
    self.counter_name = counter_name
    self.delta = delta
Constructor.

    Args:
      counter_name: name of the counter as string
      delta: increment delta as int.
    
mapreduce/operation/counters.py