code: def sha1sum_numpy(np_array):
      """
      Return the secure hash digest with sha1 algorithm for a numpy array
      """
      import hashlib
  
      return hashlib.sha1(np_array.view(np.uint8)).hexdigest()
  
file_path: TimeSide/timeside/plugins/decoder/utils.py
imports: from __future__ import division
  import numpy
label_desc: Use image node_id 9 for calling a global function with example usage: sha1sum_numpy(np_array) and returns: hashlib