def delslice(self, w_obj, w_start, w_stop):
w_descr = self.lookup(w_obj, '__delslice__')
if w_descr is not None:
w_start, w_stop = old_slice_range(self, w_obj, w_start, w_stop)
self.get_and_call_function(w_descr, w_obj, w_start, w_stop)
else:
ObjSpace.delslice(self, w_obj, w_start, w_stop)
