code: def _backslashreplace_backport(ex):
      """Replace byte sequences that failed to decode with character escapes.
  
      Does the same thing as errors="backslashreplace" from Python 3.  Python 2
      lacks this functionality out of the box, so we need to backport it.
  
      Parameters
      ----------
      ex: UnicodeDecodeError
          contains arguments of the string and start/end indexes of the bad portion.
  
      Returns
      -------
      text: unicode
          The Unicode string corresponding to the decoding of the bad section.
      end: int
          The index from which to continue decoding.
  
      Note
      ----
      Works on Py2 only.  Py3 already has backslashreplace built-in.
  
      """
      #
      # Based on:
      # https://stackoverflow.com/questions/42860186/exact-equivalent-of-b-decodeutf-8-backslashreplace-in-python-2
      #
      bstr, start, end = ex.object, ex.start, ex.end
      text = "".join(
          "\\x{:02x}".format(ord(c)) for c in bstr[start:end]
      )
      return text, end
  
imports: import collections
  import gzip
  import io
  import logging
  import struct
  import numpy
label_desc: Use image node_id 8 for calling a global function with example usage: _backslashreplace_backport(ex) and returns: text,  end