code: def hex_to_multihash(hexstr):
      # type: (str) -> ImageMultiHash
      """
      Convert a stored multihash (hex, as retrieved from str(ImageMultiHash))
      back to an ImageMultiHash object.
  
      This function is based on hex_to_hash so the same caveats apply. Namely:
  
      1. This algorithm assumes all hashes are either
                      bidimensional arrays with dimensions hash_size * hash_size,
                      or onedimensional arrays with dimensions binbits * 14.
      2. This algorithm does not work for hash_size < 2.
      """
      split = hexstr.split(",")
      hashes = [hex_to_hash(x) for x in split]
      return ImageMultiHash(hashes)
  
imports: from __future__ import absolute_import, division, print_function
  import sys
  import numpy
  from PIL import Image, ImageFilter
label_desc: Use image node_id 4 for calling a global function with example usage: hex_to_multihash(hexstr) and returns: ImageMultiHash