code: def unicode_obj(obj):
      
      if isinstance(obj, dict):
          return unicode_dict(obj)
      elif isinstance(obj, (list, tuple)):
          return unicode_list(obj)
      elif isinstance(obj, six.string_types):
          return unicode_string(obj)
      elif isinstance(obj, (int, float)):
          return obj
      elif obj is None:
          return obj
      else:
          try:
              return text(obj)
          except:
              return text(repr(obj))
docs: Make sure keys and values of dict/list/tuple is unicode. bytes will encode in base64.
  
      Can been decode by `decode_unicode_obj`