def start_exporting(self):
        self.xg.startDocument()
        self.xg.startElement(self.root_element, {
            "xmlns": "http://www.sitemaps.org/schemas/sitemap/0.9",
            "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
            "xsi:schemaLocation":
            "http://www.sitemaps.org/schemas/sitemap/0.9 "
            "http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd"
        })
Returns a list of batch indices (tuples of indices).
dataset/ETHPy150Open openstack/openstack-doc-tools/sitemap/generator/pipelines.py/SitemapItemExporter.start_exporting--crossover with--dataset/ETHPy150Open fchollet/keras/keras/engine/training.py/make_batches