| def extract_sample_id(metadata): | |
| """ | |
| Best-effort extraction of a sample identifier from the metadata stored in | |
| dataset info entries or collate_fn outputs. | |
| """ | |
| if metadata is None: | |
| return None | |
| if isinstance(metadata, dict): | |
| sample_id = metadata.get("id") or metadata.get("sample_id") | |
| if sample_id is not None: | |
| return str(sample_id) | |
| if isinstance(metadata, (list, tuple)): | |
| for item in metadata: | |
| sample_id = extract_sample_id(item) | |
| if sample_id: | |
| return sample_id | |
| return None | |
| if isinstance(metadata, (int, float)): | |
| # treat bare numeric IDs as strings to keep files consistent | |
| return str(int(metadata)) | |
| if isinstance(metadata, str): | |
| return metadata.strip() | |
| return None | |