  
      def __init__(self, expression, bbox=False, crs=False, precision=8, **extra):
          expressions = [expression]
          if precision is not None:
              expressions.append(self._handle_param(precision, 'precision', six.integer_types))
          options = 0
          if crs and bbox:
              options = 3
          elif bbox:
              options = 1
 
</s> remove             expressions.append(self._handle_param(precision, 'precision', six.integer_types))
 </s> add             expressions.append(self._handle_param(precision, 'precision', int)) </s> remove             expressions.append(self._handle_param(precision, 'precision', six.integer_types))
 </s> add             expressions.append(self._handle_param(precision, 'precision', int)) </s> remove             self._handle_param(srid, 'srid', six.integer_types),
 </s> add             self._handle_param(srid, 'srid', int), </s> remove         if isinstance(stream_or_string, six.string_types):
 </s> add         if isinstance(stream_or_string, str): </s> remove             self._handle_param(precision, 'precision', six.integer_types),
 </s> add             self._handle_param(precision, 'precision', int),
            expressions.append(self._handle_param(precision, 'precision', int))
  
      def __init__(self, expression, bbox=False, crs=False, precision=8, **extra):
          expressions = [expression]
          if precision is not None:
            expressions.append(self._handle_param(precision, 'precision', int))
          options = 0
          if crs and bbox:
              options = 3
          elif bbox:
              options = 1
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/db/models/functions.py