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3b5d03c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | # Copyright 2024 Bytedance Ltd. and/or its affiliates
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import re
from typing import Any, Dict
from mathruler.grader import grade_answer
def format_reward(response: str) -> float:
pattern = re.compile(r"<think>.*?</think>\s*<answer>.*?</answer>", re.DOTALL)
format_match = re.fullmatch(pattern, response)
return 1.0 if format_match else 0.0
def accuracy_reward(response: str, ground_truth: str) -> float:
try:
content_match = re.search(r"<answer>(.*?)</answer>", response)
given_answer = content_match.group(1).strip() if content_match else response.strip()
if grade_answer(given_answer, ground_truth.strip()):
return 1.0
except Exception:
pass
return 0.0
def compute_score(reward_input: Dict[str, Any], format_weight: float = 0.5) -> Dict[str, float]:
if not isinstance(reward_input, dict):
raise ValueError("Please use `reward_type=sequential` for r1v reward function.")
format_score = format_reward(reward_input["response"])
accuracy_score = accuracy_reward(reward_input["response"], reward_input["ground_truth"])
return {
"overall": (1 - format_weight) * accuracy_score + format_weight * format_score,
"format": format_score,
"accuracy": accuracy_score,
}
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