tmp-two-configs.py

import datasets


class NewDataset(datasets.GeneratorBasedBuilder):
    BUILDER_CONFIGS = [
        datasets.BuilderConfig(name="first"),
        datasets.BuilderConfig(name="second"),
    ]
    DEFAULT_CONFIG_NAME = "first"

    def _info(self):
        return datasets.DatasetInfo(
            features=datasets.Features({"text": datasets.Value("string")}),
        )

    def _split_generators(self, dl_manager):
        return [datasets.SplitGenerator(name=datasets.Split.TRAIN)]

    def _generate_examples(self):
        for key in range(5):
            yield key, {"text": f"{self.config.name}-{key}"}