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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fire can't find custom `__str__` of `~datasets.Dataset` from HuggingFace","articleBody":"Hi,\n\nI am using fire on a `main` function that returns a `~datasets.Dataset` object. When running from cli, I get the help screen for `~datasets.Dataset` rather than the `__str__` implementation (likely inherited from a parent class -- haven't looked).\n\n## Reproducible example\n\n```python\nfrom datasets import Dataset\nimport fire\n\ndef main():\n    # Create a simple dataset\n    dataset = Dataset.from_dict({\"a\": [1, 2, 3], \"b\": [4, 5, 6]})\n    return dataset\n\nif __name__ == \"__main__\":\n    fire.Fire(main)\n    \n    # This works but I feel shouldn't be necessary:\n    # def custom_serializer(obj: object) -\u003e str:\n    #     if hasattr(obj, \"__str__\"):\n    #         return str(obj)\n    #     else:\n    #         return \"\"\n    # fire.Fire(main, serialize=custom_serializer)\n```","author":{"url":"https://github.com/nerdai","@type":"Person","name":"nerdai"},"datePublished":"2025-04-07T01:05:29.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/595/python-fire/issues/595"}