code: def _key_for_segment(segment, topic_words):
      """A segment may have a single number of an iterable of them."""
      segment_key = (
          tuple(segment) if hasattr(segment, "__iter__") else segment
      )
      return segment_key, topic_words
  
file_path: gensim/gensim/topic_coherence/indirect_confirmation_measure.py
imports: import itertools
  import logging
  import numpy
  import scipy.sparse
  from gensim.topic_coherence.direct_confirmation_measure import aggregate_segment_sims, log_ratio_measure
label_desc: Use image node_id 7 for calling a global function with example usage: _key_for_segment(segment, topic_words) and returns: segment_key,  topic_words