class_docstr: An accumulator object capable of computing NIST score using multiple references.
docstr: Reset the object, zero all counters.
docstr_tok: ["Reset","the","object",",","zero","all","counters","."]
code: def reset(self):
      """Reset the object, zero all counters."""
      self.ref_ngrams = [
          defaultdict(int) for _ in range(self.max_ngram + 1)
      ]  # has 0-grams
      # these two don't have 0-grams
      self.hit_ngrams = [[] for _ in range(self.max_ngram)]
      self.cand_lens = [[] for _ in range(self.max_ngram)]
      self.avg_ref_len = 0.0
  
imports: from __future__ import unicode_literals
  from __future__ import division
  from builtins import zip
  from builtins import range
  from past.utils import old_div
  from builtins import object
  from collections import defaultdict
  import math
  import re
label_desc: Use image node_id 2 for calling the NISTScore obj's underlying member method code with example usage: obj.reset() without return types