code: def force_unicode(s):
      """
      return string of a bytes
      ! borrow from onnx
      Args:
          s: string or bytes
      Returns:
          string
      """
      try:
          return s.decode("utf-8")
      except AttributeError:
          return s
  
file_path: singa/python/singa/utils.py
imports: import sys
  import numpy
  import collections
  from .None import singa_wrap
label_desc: Use image node_id 8 for calling a global function with example usage: force_unicode(s) and returns: s, s