code: def expand(data):
      """
      Expand *data* as a initializer list of hexadecimal char escapes.
      """
      expanded_data = ", ".join([hex(c) for c in bytearray(data)])
      return expanded_data.encode("ascii")
  
label_desc: Use image node_id 1 for calling a global function with example usage: expand(data) and returns: expanded_data