{"record":{"id":"e35c537282de232d","repo":"tensorflow/models","slug":"class-directory-is-empty-class-path","errorCode":null,"errorMessage":"Class directory is empty: {class_path}","messagePattern":"Class directory is empty: (.+?)","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"official/projects/waste_identification_ml/fine_tuning/Dinov3_image_classifier/datasets.py","lineNumber":237,"sourceCode":"      ValueError: If `train_directory` contains no class subdirectories or if\n        any class subdirectory contains no files.\n  \"\"\"\n  class_names = sorted(\n      entry.name for entry in train_directory.iterdir() if entry.is_dir()\n  )\n  if not class_names:\n    raise ValueError(\n        f\"No class subdirectories found in train_directory: {train_directory}\"\n    )\n\n  class_counts = []\n  for class_name in class_names:\n    class_path = train_directory / class_name\n    number_of_files = sum(\n        1 for entry in class_path.iterdir() if entry.is_file()\n    )\n    if number_of_files == 0:\n      raise ValueError(f\"Class directory is empty: {class_path}\")\n    class_counts.append(number_of_files)\n\n  number_of_classes = len(class_counts)\n  total_samples = sum(class_counts)\n  weights = [\n      total_samples / (number_of_classes * count) for count in class_counts\n  ]\n\n  _LOGGER.info(\"Class counts: %s\", dict(zip(class_names, class_counts)))\n  _LOGGER.info(\"Class weights: %s\", dict(zip(class_names, weights)))\n\n  return torch.tensor(weights, dtype=torch.float32)\n","sourceCodeStart":219,"sourceCodeEnd":250,"githubUrl":"https://github.com/tensorflow/models/blob/e006f5f0d534913e49c1f1dae87364039fa607e2/official/projects/waste_identification_ml/fine_tuning/Dinov3_image_classifier/datasets.py#L219-L250","documentation":"Error \"Class directory is empty: {class_path}\" thrown in tensorflow/models.","triggerScenarios":"Thrown at official/projects/waste_identification_ml/fine_tuning/Dinov3_image_classifier/datasets.py:237 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"e006f5f0d534913e49c1f1dae87364039fa607e2","analyzedAt":"2026-08-24T14:09:15.576Z","schemaVersion":2},"datasetVersion":"2026-08-24T17:17:21.512Z"}