{ "run_id": 2, "model": "llama3.2-3b", "mode": "oneshot", "challenge": "calculator", "sample": 0, "status": "ok", "error": null, "score_total": 40.0, "score_tests": 0.0, "score_deliverables": 1.0, "score_content": 1.0, "tests_passed": 0, "tests_failed": 1, "wall_secs": 12.351432290990488, "slug": "run2-llama3.2-3b-oneshot-calculator-s0", "challenge_title": "Expression evaluator (no eval)", "spec": "Create calc.py with exactly one public function:\n\nevaluate(expr: str) -> float\n Evaluate an arithmetic expression containing numbers (integers or decimals), the binary operators + - * /, unary minus, parentheses, and arbitrary whitespace. Normal precedence: * and / bind tighter than + and -; operators of equal precedence associate left to right. Division is true division. Examples: evaluate(\"2+3*4\") == 14, evaluate(\"(2+3)*4\") == 20, evaluate(\"2*-3\") == -6.\n\nYou must parse the expression yourself: using eval() or exec() is forbidden and is checked by the test suite. Use only the Python standard library.", "expected_files": [ "calc.py" ], "content_checks": { "calc.py": [ "def evaluate" ] }, "test_files": { "test_calc.py": "from pathlib import Path\n\nfrom calc import evaluate\n\n\ndef test_precedence():\n assert evaluate(\"2+3*4\") == 14\n\n\ndef test_parentheses():\n assert evaluate(\"(2+3)*4\") == 20\n assert evaluate(\"2*(3+(4-1))\") == 12\n\n\ndef test_true_division():\n assert evaluate(\"10/4\") == 2.5\n\n\ndef test_left_associativity():\n assert evaluate(\"10-3-2\") == 5\n assert evaluate(\"16/4/2\") == 2\n\n\ndef test_unary_minus():\n assert evaluate(\"-3+5\") == 2\n assert evaluate(\"2*-3\") == -6\n\n\ndef test_whitespace_and_decimals():\n assert evaluate(\" 1.5 + 2.25 \") == 3.75\n\n\ndef test_does_not_use_eval():\n src = Path(\"calc.py\").read_text()\n assert \"eval(\" not in src\n assert \"exec(\" not in src\n" }, "events": [ { "ts": "2026-07-17T16:00:43.036840+00:00", "event": "start", "run": 2, "model": "llama3.2-3b", "mode": "oneshot", "challenge": "calculator", "sample": 0 }, { "ts": "2026-07-17T16:00:43.036878+00:00", "event": "prompt", "mode": "oneshot", "content": "You are completing a coding task in one shot. Write complete files that satisfy the spec below. Tests (pytest) will be run against your files; you cannot run them yourself.\n\nReply with ONE JSON object and nothing else:\n{\"files\": {\"\": \"\", ...}}\n\nRequired deliverable files: calc.py\n\nSPEC:\nCreate calc.py with exactly one public function:\n\nevaluate(expr: str) -> float\n Evaluate an arithmetic expression containing numbers (integers or decimals), the binary operators + - * /, unary minus, parentheses, and arbitrary whitespace. Normal precedence: * and / bind tighter than + and -; operators of equal precedence associate left to right. Division is true division. Examples: evaluate(\"2+3*4\") == 14, evaluate(\"(2+3)*4\") == 20, evaluate(\"2*-3\") == -6.\n\nYou must parse the expression yourself: using eval() or exec() is forbidden and is checked by the test suite. Use only the Python standard library.\n" }, { "ts": "2026-07-17T16:00:55.038631+00:00", "event": "completion", "content": "{\"files\": {\"calc.py\": \"import re\\nfrom shunting_yard import ShuntingYard\\n\\ndef evaluate(expr: str) -> float:\\n # Define operator precedence\\n precedence = {'+': 1, '-': 1, '*': 2, '/': 2}\\n # Create a dictionary to map operators to their corresponding functions\\n operators = {'+': lambda x, y: x + y, '-': lambda x, y: x - y, '*': lambda x, y: x * y, '/': lambda x, y: x / y}\\n # Use shunting-yard parsing to convert infix notation to postfix\\n postFix = ShuntingYard().parse(expr)\\n # Evaluate the postfix expression\\n stack = []\\n for token in postFix:\\n if token.isnumeric():\\n stack.append(float(token))\\n elif token == '-':\\n stack.append(-stack.pop())\\n else:\\n operand2 = stack.pop()\\n operand1 = stack.pop()\\n result = operators[token](operand1, operand2)\\n stack.append(result)\\n return stack[0]\"}}", "tokens": 254 }, { "ts": "2026-07-17T16:00:55.039453+00:00", "event": "write_file", "path": "calc.py", "bytes": 878 }, { "ts": "2026-07-17T16:00:55.388298+00:00", "event": "graded", "total": 40.0, "tests_passed": 0, "tests_failed": 1, "output": "\n==================================== ERRORS ====================================\n________________________ ERROR collecting test_calc.py _________________________\nImportError while importing test module '/Users/richardblundell/repos/llmcoderlab/.lab/runs/2/llama3.2-3b/oneshot/calculator/s0/test_calc.py'.\nHint: make sure your test modules/packages have valid Python names.\nTraceback:\n/opt/homebrew/Cellar/python@3.14/3.14.4/Frameworks/Python.framework/Versions/3.14/lib/python3.14/importlib/__init__.py:88: in import_module\n return _bootstrap._gcd_import(name[level:], package, level)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\ntest_calc.py:3: in \n from calc import evaluate\ncalc.py:2: in \n from shunting_yard import ShuntingYard\nE ModuleNotFoundError: No module named 'shunting_yard'\n=========================== short test summary info ============================\nERROR test_calc.py\n!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!\n1 error in 0.09s\n" } ], "files": { "calc.py": "import re\nfrom shunting_yard import ShuntingYard\n\ndef evaluate(expr: str) -> float:\n # Define operator precedence\n precedence = {'+': 1, '-': 1, '*': 2, '/': 2}\n # Create a dictionary to map operators to their corresponding functions\n operators = {'+': lambda x, y: x + y, '-': lambda x, y: x - y, '*': lambda x, y: x * y, '/': lambda x, y: x / y}\n # Use shunting-yard parsing to convert infix notation to postfix\n postFix = ShuntingYard().parse(expr)\n # Evaluate the postfix expression\n stack = []\n for token in postFix:\n if token.isnumeric():\n stack.append(float(token))\n elif token == '-':\n stack.append(-stack.pop())\n else:\n operand2 = stack.pop()\n operand1 = stack.pop()\n result = operators[token](operand1, operand2)\n stack.append(result)\n return stack[0]" }, "file_metrics": [ { "path": "calc.py", "loc": 23, "sloc": 18, "chars": 878, "is_python": true, "functions": 1, "classes": 0, "complexity": 4, "max_complexity": 4, "max_depth": 4, "imports": [ "re", "shunting_yard" ], "avg_function_len": 20.0, "parse_error": false } ], "code": { "files": 1, "loc": 23, "sloc": 18, "chars": 878, "functions": 1, "classes": 0, "complexity": 4, "max_complexity": 4, "max_depth": 4, "imports": [ "re", "shunting_yard" ], "avg_function_len": 20.0, "parse_errors": 0 }, "session": { "model_calls": 1, "actions": {}, "bad_actions": 0, "test_runs": 0, "tokens_out": 254, "tokens_in": 0, "turns": 0 }, "test_output": "\n==================================== ERRORS ====================================\n________________________ ERROR collecting test_calc.py _________________________\nImportError while importing test module '/Users/richardblundell/repos/llmcoderlab/.lab/runs/2/llama3.2-3b/oneshot/calculator/s0/test_calc.py'.\nHint: make sure your test modules/packages have valid Python names.\nTraceback:\n/opt/homebrew/Cellar/python@3.14/3.14.4/Frameworks/Python.framework/Versions/3.14/lib/python3.14/importlib/__init__.py:88: in import_module\n return _bootstrap._gcd_import(name[level:], package, level)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\ntest_calc.py:3: in \n from calc import evaluate\ncalc.py:2: in \n from shunting_yard import ShuntingYard\nE ModuleNotFoundError: No module named 'shunting_yard'\n=========================== short test summary info ============================\nERROR test_calc.py\n!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!\n1 error in 0.09s\n" }