StepProbe / scripts /eval_accuracy.py
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"""LaTeX-aware accuracy evaluation.
Addresses the answer-equivalence rabbit hole flagged in the paper
(\\left(3,\\frac{\\pi}{2}\\right) == (3,\\frac{\\pi}{2})) by delegating to
HuggingFace's `math_verify` library, which parses LaTeX + symbolic forms
and checks equivalence via SymPy.
Two entry points:
1. A library function `compute_accuracy(jsonl_path, benchmark)` reusable
from the figure scripts (e.g. make_ablation_figure.py loading the
FP16 reference accuracy).
2. A CLI that writes an accuracy JSON next to the input jsonl so
downstream scripts can avoid redoing the work.
Input jsonls may be:
- Raw inference outputs (has: `output`, `gold_answer`)
- Segmented outputs (has: `final_answer`, possibly `gold_answer`)
- Diagnosed outputs (has: `is_correct_final` already — we skip
and just count)
"""
import argparse
import json
import os
import re
from functools import lru_cache
from typing import List, Optional, Tuple
# ---------------------------------------------------------------------------
# Gold-answer loader (cached per benchmark)
# ---------------------------------------------------------------------------
@lru_cache(maxsize=8)
def _load_gold(benchmark: str):
from datasets import load_dataset
if benchmark == "gsm8k":
ds = load_dataset("openai/gsm8k", "main", split="test")
return {f"gsm8k_{i}": ex["answer"].split("####")[-1].strip()
for i, ex in enumerate(ds)}
if benchmark == "math500":
ds = load_dataset("HuggingFaceH4/MATH-500", split="test")
return {f"math500_{i}": ex["answer"] for i, ex in enumerate(ds)}
if benchmark == "gpqa":
ds = load_dataset("Idavidrein/gpqa", "gpqa_diamond", split="train")
return {f"gpqa_{i}": ex.get("Correct Answer", "") for i, ex in enumerate(ds)}
raise ValueError(f"Unknown benchmark: {benchmark}")
# ---------------------------------------------------------------------------
# Answer extraction + equivalence
# ---------------------------------------------------------------------------
def _balanced_extract(raw: str) -> Optional[str]:
"""Return the contents of the LAST `\\boxed{...}` in `raw`, handling
arbitrarily nested braces. Returns None if no closed `\\boxed{...}` exists.
Regex with one level of bracket nesting (as used by some upstream
pipelines including stepprobe.segment) silently truncates `\\frac{14}{3}`
to `\\frac{14` — hence this hand-written scanner.
"""
idx = raw.rfind(r"\boxed{")
if idx < 0:
return None
start = idx + len(r"\boxed{")
depth = 1
i = start
while i < len(raw):
ch = raw[i]
if ch == "{":
depth += 1
elif ch == "}":
depth -= 1
if depth == 0:
return raw[start:i]
i += 1
return None
def _looks_balanced(s: str) -> bool:
"""Cheap sanity check: equal open/close braces AND no trailing backslash."""
return s.count("{") == s.count("}") and not s.endswith("\\")
def extract_pred(trace: dict) -> str:
"""Pull out the model's final answer.
Prefers `final_answer` if it has balanced braces; otherwise re-extracts
from the raw output with a balanced-brace scanner.
"""
pred = (trace.get("final_answer") or "").strip()
if pred and _looks_balanced(pred):
return pred
raw = trace.get("output") or trace.get("raw_output") or ""
rescued = _balanced_extract(raw)
return rescued or pred
def _equiv(pred: str, gold: str) -> bool:
"""math_verify-based equivalence; degrades gracefully to string match."""
if not pred or not gold:
return False
try:
from math_verify import parse, verify
# math_verify prefers LaTeX wrapped in \\boxed{...}; synthesize if needed.
p_str = pred if pred.startswith("\\boxed") else f"\\boxed{{{pred}}}"
g_str = gold if gold.startswith("\\boxed") else f"\\boxed{{{gold}}}"
return bool(verify(parse(g_str), parse(p_str)))
except Exception:
# SymPy timeouts / parse errors — fall back to a permissive
# normalized string match so we never block on a single weird trace.
def norm(s):
return (s or "").strip().strip("$").replace(" ", "").replace(",", "").lower()
return norm(pred) == norm(gold)
# ---------------------------------------------------------------------------
# Public API
# ---------------------------------------------------------------------------
def compute_accuracy(jsonl_path: str, benchmark: str,
use_cache: bool = True) -> Optional[Tuple[int, int]]:
"""Return (n_correct, n_total) for one jsonl file, or None if missing.
Writes a small `.acc.json` sidecar next to the jsonl so repeated calls
are O(1) rather than O(n_problems).
"""
if not os.path.exists(jsonl_path):
return None
cache_path = jsonl_path + ".acc.json"
if use_cache and os.path.exists(cache_path):
with open(cache_path) as f:
d = json.load(f)
return d["n_correct"], d["n_total"]
# If the file already has `is_correct_final`, trust it — this matches
# the convention used elsewhere in the pipeline for diagnosed files.
traces = []
has_verdict = True
with open(jsonl_path) as f:
for line in f:
t = json.loads(line)
traces.append(t)
if "is_correct_final" not in t:
has_verdict = False
if has_verdict and traces:
n_correct = sum(1 for t in traces if t.get("is_correct_final"))
n_total = len(traces)
else:
golds = _load_gold(benchmark)
n_correct, n_total = 0, 0
for t in traces:
pid = t.get("problem_id")
gold = t.get("gold_answer") or golds.get(pid, "")
pred = extract_pred(t)
n_total += 1
if _equiv(pred, gold):
n_correct += 1
if use_cache:
with open(cache_path, "w") as f:
json.dump({"n_correct": n_correct, "n_total": n_total,
"accuracy": n_correct / n_total if n_total else None,
"benchmark": benchmark}, f)
return n_correct, n_total
def accuracy(jsonl_path: str, benchmark: str) -> Optional[float]:
r = compute_accuracy(jsonl_path, benchmark)
if r is None or r[1] == 0:
return None
return r[0] / r[1]
# ---------------------------------------------------------------------------
# CLI
# ---------------------------------------------------------------------------
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--jsonl", required=True, help="Inference/segmented/diagnosis jsonl")
parser.add_argument("--benchmark", required=True, choices=["gsm8k", "math500", "gpqa"])
parser.add_argument("--no-cache", action="store_true")
args = parser.parse_args()
r = compute_accuracy(args.jsonl, args.benchmark, use_cache=not args.no_cache)
if r is None:
print(f"missing: {args.jsonl}")
return
n_correct, n_total = r
print(f"{args.jsonl}")
print(f" accuracy: {n_correct}/{n_total} = {n_correct/n_total:.3f}"
if n_total else " (no traces)")
if __name__ == "__main__":
main()