{"record":{"id":"f7e4253032c047f7","repo":"rohitg00/ai-engineering-from-scratch","slug":"uncertainties-must-be-a-list","errorCode":null,"errorMessage":"uncertainties must be a list","messagePattern":"uncertainties must be a list","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"certifications/claude/lessons/05-output-evaluation-and-validation/code/main.py","lineNumber":94,"sourceCode":"        errors.append(\"schema and totals must use deterministic evaluators\")\n    release = record.get(\"release\")\n    blocker_failures = sum(claim.get(\"severity\") == \"blocker\" and claim.get(\"result\") == \"fail\" for claim in claims if isinstance(claim, dict))\n    required_failures = sum(claim.get(\"severity\") == \"required\" and claim.get(\"result\") == \"fail\" for claim in claims if isinstance(claim, dict))\n    if not isinstance(release, dict) or release.get(\"blockerFailures\") != blocker_failures or release.get(\"requiredFailures\") != required_failures:\n        errors.append(\"release failure counts must match claims\")\n    elif blocker_failures and release.get(\"decision\") != \"revise\":\n        errors.append(\"blocker failure requires a revise decision\")\n    elif not str(release.get(\"nextAction\", \"\")).strip():\n        errors.append(\"release nextAction is required\")\n    if not isinstance(record.get(\"uncertainties\"), list):\n        errors.append(\"uncertainties must be a list\")\n    return errors\n\n\ndef summarize(record: dict[str, Any]) -> dict[str, Any]:\n    errors = validate_record(record)\n    if errors:\n        raise ValueError(\"; \".join(errors))\n    results = Counter(claim[\"result\"] for claim in record[\"claims\"])\n    return {\"claims\": len(record[\"claims\"]), \"results\": dict(results), \"decision\": record[\"release\"][\"decision\"], \"failedClaimIds\": [claim[\"id\"] for claim in record[\"claims\"] if claim[\"result\"] == \"fail\"]}\n\n\ndef load_record(path: Path) -> dict[str, Any]:\n    value = json.loads(path.read_text(encoding=\"utf-8\"))\n    if not isinstance(value, dict):\n        raise ValueError(\"record root must be an object\")\n    return value\n\n\nif __name__ == \"__main__\":\n    path = Path(__file__).parents[1] / \"outputs\" / \"claim-validation-record.json\"\n    record = load_record(path)\n    print(json.dumps({\"valid\": not validate_record(record), \"summary\": summarize(record)}, indent=2))\n","sourceCodeStart":76,"sourceCodeEnd":110,"githubUrl":"https://github.com/rohitg00/ai-engineering-from-scratch/blob/39ea8a1c6d0b61f071226eff7ede4d4105fed820/certifications/claude/lessons/05-output-evaluation-and-validation/code/main.py#L76-L110","documentation":"Error \"uncertainties must be a list\" thrown in rohitg00/ai-engineering-from-scratch.","triggerScenarios":"Thrown at certifications/claude/lessons/05-output-evaluation-and-validation/code/main.py:94 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":"39ea8a1c6d0b61f071226eff7ede4d4105fed820","analyzedAt":"2026-08-26T03:13:46.626Z","schemaVersion":2},"datasetVersion":"2026-08-26T07:17:17.940Z"}