synth/games/tasks/space_reasoning/scripts/space_reasoning_verifier.py

import re
from base.data import Data
from base.verifier import Verifier, THOUGHT_DELIMITER_START, THOUGHT_DELIMITER_END
import math_verify 


class SpaceReasoningVerifier(Verifier):
    """
    验证器用于空间推理游戏的答案是否正确
    """
    def verify(self, data: Data, test_answer: str):
        test_answer = self.extract_answer(test_answer)
        if test_answer is None:
            return False
        return test_answer.lower() == data.answer.lower()
    
    def extract_answer(self, answer_str):
        # 先找到最后一个\boxed{的位置
        last_box_index = answer_str.rfind("\\boxed{")
        
        if last_box_index == -1:
            return None
        
        # 从\boxed{开始截取到正确的闭合位置，处理嵌套括号
        start_index = last_box_index + len("\\boxed{")
        bracket_stack = 1  # 已经遇到了一个左括号
        end_index = start_index
        
        while end_index < len(answer_str) and bracket_stack > 0:
            if answer_str[end_index] == '{':
                bracket_stack += 1
            elif answer_str[end_index] == '}':
                bracket_stack -= 1
            end_index += 1
        
        if bracket_stack != 0:  # 括号不匹配
            return None
        
        # 提取\boxed{}内的内容
        latex_content = answer_str[start_index:end_index-1].strip()
        return latex_content