Harvey AI法律智能助手

import refrom dataclasses import dataclassfrom typing import List, Dictfrom enum import Enum  class ClauseType(Enum):    CONFIDENTIALITY = "保密条款"    LIABILITY = "违约责任"    IP = "知识产权"    PAYMENT = "付款条款"    TERMINATION = "终止条款"    OTHER = "其他条款"  class RiskLevel(Enum):    HIGH = "高"    MEDIUM = "中"    LOW = "低"    NONE = "无"  @dataclassclass ContractClause:    clause_id: int    text: str    clause_type: ClauseType    risk_level: RiskLevel = RiskLevel.NONE  @dataclassclass RiskAssessment:    clause_id: int    risk_level: RiskLevel    risk_reason: str    suggestion: str  class ContractReviewer:    RISK_KEYWORDS = {        RiskLevel.HIGH: ["无限责任", "不可撤销", "放弃所有权利", "无条件赔偿"],        RiskLevel.MEDIUM: ["自动续约", "单方修改", "模糊", "据实际情况"],        RiskLevel.LOW: ["合理期限内", "双方协商"],    }     def __init__(self):        self.clauses: List[ContractClause] = []        self.assessments: List[RiskAssessment] = []     def parse_contract(self, contract_text: str) -> List[ContractClause]:        pattern = r'第[一二三四五六七八九十百\d]+条[：:](.*?)(?=第[一二三四五六七八九十百\d]+条[：:]|$)'        matches = re.findall(pattern, contract_text, re.DOTALL)        for idx, text in enumerate(matches, 1):            clause_type = self._classify_clause(text)            clause = ContractClause(clause_id=idx, text=text.strip(), clause_type=clause_type)            self.clauses.append(clause)        return self.clauses     def _classify_clause(self, text: str) -> ClauseType:        if any(k in text for k in ["保密", "机密"]):            return ClauseType.CONFIDENTIALITY        if any(k in text for k in ["违约", "赔偿", "责任"]):            return ClauseType.LIABILITY        if any(k in text for k in ["知识产权", "专利", "商标"]):            return ClauseType.IP        if any(k in text for k in ["付款", "价款", "费用"]):            return ClauseType.PAYMENT        if any(k in text for k in ["终止", "解除"]):            return ClauseType.TERMINATION        return ClauseType.OTHER     def assess_risks(self) -> List[RiskAssessment]:        for clause in self.clauses:            risk_level = RiskLevel.NONE            risk_reason = ""            for level, keywords in self.RISK_KEYWORDS.items():                for kw in keywords:                    if kw in clause.text:                        risk_level = level                        risk_reason = f"检测到风险关键词：{kw}"                        break                if risk_level != RiskLevel.NONE:                    break            if clause.clause_type == ClauseType.LIABILITY and risk_level == RiskLevel.NONE:                risk_level = RiskLevel.LOW                risk_reason = "违约责任条款需人工复核"            self.assessments.append(RiskAssessment(                clause_id=clause.clause_id,                risk_level=risk_level,                risk_reason=risk_reason,                suggestion=self._generate_suggestion(risk_level),            ))            clause.risk_level = risk_level        return self.assessments     def _generate_suggestion(self, risk_level: RiskLevel) -> str:        suggestions = {            RiskLevel.HIGH: "建议律师重点审查，考虑删除或修改该条款",            RiskLevel.MEDIUM: "建议律师复核并明确条款表述",            RiskLevel.LOW: "建议关注，可酌情调整",            RiskLevel.NONE: "条款风险较低，常规审查即可",        }        return suggestions.get(risk_level, "")     def generate_report(self) -> Dict:        high = [a for a in self.assessments if a.risk_level == RiskLevel.HIGH]        medium = [a for a in self.assessments if a.risk_level == RiskLevel.MEDIUM]        low = [a for a in self.assessments if a.risk_level == RiskLevel.LOW]        return {            "总条款数": len(self.clauses),            "高风险条款": len(high),            "中风险条款": len(medium),            "低风险条款": len(low),            "风险摘要": f"共识别{len(high)}处高风险、{len(medium)}处中风险条款",            "详细分析": [                {"条款编号": a.clause_id, "风险等级": a.risk_level.value,                 "风险原因": a.risk_reason, "修改建议": a.suggestion}                for a in self.assessments if a.risk_level != RiskLevel.NONE            ],        }  if __name__ == "__main__":    sample_contract = """    第一条：保密义务    双方应对本合同涉及的商业机密严格保密，保密期限为合同终止后5年。     第二条：违约责任    任何一方违约应承担无限责任，并不可撤销地放弃所有权利抗辩。     第三条：知识产权    本合同履行过程中产生的知识产权归委托方所有。     第四条：付款条款    委托方应在收到发票后合理期限内支付款项。     第五条：合同终止    任何一方可在提前30天书面通知后终止本合同。    """    reviewer = ContractReviewer()    clauses = reviewer.parse_contract(sample_contract)    print(f"解析出{len(clauses)}个条款")    for c in clauses:        print(f"  条款{c.clause_id} [{c.clause_type.value}]")    reviewer.assess_risks()    report = reviewer.generate_report()    print(f"风险摘要：{report['风险摘要']}")