class_docstr: An accumulator object capable of computing NIST score using multiple references.
docstr: Return the current NIST score, according to the accumulated counts.
docstr_tok: ["Return","the","current","NIST","score",",","according","to","the","accumulated","counts","."]
code: def score(self):
      """Return the current NIST score, according to the accumulated counts."""
      return self.nist()
  
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 4 for calling the NISTScore obj's underlying member method code with example usage: obj.score() and returns: self