Method __del__

Lib/tempfile.py:771–779

(self)

        return self._file.__iter__()

    def __del__(self):
        if not self.closed:
            _warnings.warn(
                "Unclosed file {!r}".format(self),
                ResourceWarning,
                stacklevel=2,
                source=self
            )
            self.close()

    def close(self):
        self._file.close()