class_docstr: A counter to count ratio of something. 
docstr: Args:
      cnt(int): the count of some event of interest.
      tot(int): the total number of events.
code: def feed(self, count, total=1):
      """
      Args:
          cnt(int): the count of some event of interest.
          tot(int): the total number of events.
      """
      self._tot += total
      self._cnt += count
  
imports: import numpy
label_desc: Use image node_id 3 for calling the RatioCounter obj's underlying member method code with example usage: obj.feed(count, total) without return types