          an integer or the Field's string label.  Note that the Field object
          is not the field's _value_ -- use the `get` method instead to
          retrieve the value (e.g. an integer) instead of a Field instance.
          """
          if isinstance(index, six.string_types):
              i = self.index(index)
          else:
              if index < 0 or index > self.num_fields:
                  raise OGRIndexError('index out of range')
              i = index
 
</s> remove         if isinstance(index, six.string_types):
 </s> add         if isinstance(index, str): </s> remove         if not isinstance(target, six.string_types) or not isinstance(index, int):
 </s> add         if not isinstance(target, str) or not isinstance(index, int): </s> remove         if isinstance(index, six.integer_types):
 </s> add         if isinstance(index, int): </s> remove         if isinstance(dr_input, six.string_types):
 </s> add         if isinstance(dr_input, str): </s> remove             # Note: We use .decode() here, instead of six.text_type(s, encoding,
 </s> add             # Note: We use .decode() here, instead of str(s, encoding,
        if isinstance(index, str):
          an integer or the Field's string label.  Note that the Field object
          is not the field's _value_ -- use the `get` method instead to
          retrieve the value (e.g. an integer) instead of a Field instance.
          """
        if isinstance(index, str):
              i = self.index(index)
          else:
              if index < 0 or index > self.num_fields:
                  raise OGRIndexError('index out of range')
              i = index
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed six.<various>_types usage

Thanks Tim Graham and Simon Charette for the reviews. 
django/contrib/gis/gdal/feature.py