code: def _drop_nodes_from_errorpaths(self, _errors, dp_items, sp_items):
          
          dp_basedepth = len(self.document_path)
          sp_basedepth = len(self.schema_path)
          for error in _errors:
              for i in sorted(dp_items, reverse=True):
                  error.document_path = \
                      drop_item_from_tuple(error.document_path, dp_basedepth + i)
              for i in sorted(sp_items, reverse=True):
                  error.schema_path = \
                      drop_item_from_tuple(error.schema_path, sp_basedepth + i)
              if error.child_errors:
                  self._drop_nodes_from_errorpaths(error.child_errors,
                                                   dp_items, sp_items)
docs: Removes nodes by index from an errorpath, relatively to the
              basepaths of self.
  
          :param errors: A list of :class:`errors.ValidationError` instances.
          :param dp_items: A list of integers, pointing at the nodes to drop from
                           the :attr:`document_path`.
          :param sp_items: Alike ``dp_items``, but for :attr:`schema_path`.