def __init__(self, initial_map=None):
    """Constructor.

    Args:
      initial_map: initial counter values map from counter name (string) to
        counter value (int).
    """
    if initial_map:
      self.counters = initial_map
    else:
      self.counters = {}
Constructor.

    Args:
      initial_map: initial counter values map from counter name (string) to
        counter value (int).
    
mapreduce/model.py