code: def hashhex(s):
      """Returns a heximal formated SHA1 hash of the input string."""
      h = hashlib.sha1()
      h.update(s.encode())
      return h.hexdigest()
  
file_path: delta/egs/cnn_dailymail/seq2seq/v1/local/make_datafiles.py
imports: import collections
  import hashlib
  import os
  import subprocess
  import sys
  from absl import logging
label_desc: Use image node_id 3 for calling a global function with example usage: hashhex(s) and returns: h