Method __del__

Lib/xml/etree/ElementTree.py:1272–1277

(self, _warn=warnings.warn)

            gen.close()

        def __del__(self, _warn=warnings.warn):
            if close_source:
                try:
                    _warn(f"unclosed iterparse iterator {source.name!r}", ResourceWarning, stacklevel=2)
                finally:
                    source.close()

    it = IterParseIterator()
    it.root = None