class_docstr: Summarizer that picks sentences randomly.
code: def _get_random_ratings(self, sentences):
      ratings = list(range(len(sentences)))
      random.shuffle(ratings)
  
      return dict((s, r) for s, r in zip(sentences, ratings))
  
imports: from __future__ import absolute_import
  from __future__ import division, print_function, unicode_literals
  import random
  from ._summarizer import AbstractSummarizer
label_desc: Use image node_id 2 for calling the RandomSummarizer obj's underlying member method code with example usage: obj._get_random_ratings(sentences) and returns: dict