#!/usr/bin/env python3 """ Graph Memory Demo - 纯图数据库调用 Demo 基于 DeepSeek API Tool Calls 实现摒弃传统上下文的自主记忆多轮对话 验证目的：无上下文纯图数据库记忆存储 """ import json import os import uuid from datetime import datetime DEEPSEEK_API_KEY = os.environ.get("DEEPSEEK_API_KEY", "") DEEPSEEK_BASE_URL = "https://api.deepseek.com" MODEL_NAME = "deepseek-chat" NEO4J_URI = os.environ.get("NEO4J_URI", "bolt://localhost:7687") NEO4J_USER = os.environ.get("NEO4J_USER", "neo4j") NEO4J_PASSWORD = os.environ.get("NEO4J_PASSWORD", "neo4j") CURRENT_SESSION_ID = f"session-{datetime.now().strftime('%Y%m%d')}-{uuid.uuid4().hex[:4]}" CURRENT_TURN = 0 TOOLS = [ { "type": "function", "function": { "name": "memory_recall", "description": "当你对当前输入中的实体、指代、或关系不确定时，调用此工具检索相关记忆。输入为自然语言查询意图，系统将返回相关子图。支持时间范围和多跳路径查询。", "parameters": { "type": "object", "properties": { "query_intent": {"type": "string", "description": "模型用自然语言描述想查什么"}, "seed_entities": {"type": "array", "items": {"type": "string"}, "description": "可选：已识别的实体ID"}, "depth": {"type": "integer", "description": "期望的遍历深度，由模型根据复杂度决定，默认2"}, "time_range": {"type": "object", "description": "可选：时间范围筛选", "properties": {"days": {"type": "integer", "description": "最近N天"}}}, "session_filter": {"type": "string", "description": "可选：限定特定会话ID"} }, "required": ["query_intent"] } } }, { "type": "function", "function": { "name": "memory_commit", "description": "当你认为当前对话包含对未来轮次有价值的信息时，将抽取的三元组写入图库。仅在信息具有跨轮次引用潜力时调用。支持批量写入。", "parameters": { "type": "object", "properties": { "triplets": { "type": "array", "items": { "type": "object", "properties": { "subject": {"type": "string"}, "relation": {"type": "string"}, "object": {"type": "string"}, "confidence": {"type": "number"} }, "required": ["subject", "relation", "object"] }, "description": "要写入的三元组列表" }, "entity_types": {"type": "array", "items": {"type": "string"}, "description": "模型动态提议的类型"}, "temporal_tag": {"type": "string", "description": "可选：时间标记（如'2026-04-08'）"} }, "required": ["triplets"] } } }, { "type": "function", "function": { "name": "memory_purge", "description": "当你发现记忆中的信息与当前认知矛盾，或用户明确要求更正时，删除指定关系。优先于memory_commit执行以维护一致性。", "parameters": { "type": "object", "properties": { "criteria": { "type": "object", "properties": { "subject_contains": {"type": "string"}, "relation_type": {"type": "string"}, "target_contains": {"type": "string"}, "time_before": {"type": "string"}, "session_id": {"type": "string"} }, "description": "删除条件" }, "mode": {"type": "string", "enum": ["soft", "supersede"], "description": "soft=逻辑删除, supersede=纠错替代", "default": "soft"}, "new_relation": {"type": "object", "description": "supersede模式时的新关系", "properties": {"relation": {"type": "string"}, "target": {"type": "string"}}} }, "required": ["criteria"] } } }, { "type": "function", "function": { "name": "memory_introspect", "description": "检索当前对话会话的元数据：已讨论的实体、关系密度、记忆热点。用于自我监控信息缺口。", "parameters": { "type": "object", "properties": { "session_id": {"type": "string", "description": "可选：指定会话ID，默认当前会话"} }, "required": [] } } }, { "type": "function", "function": { "name": "memory_archive", "description": "归档N天前的非活跃关系，用于清理低频查询数据。", "parameters": { "type": "object", "properties": { "days": {"type": "integer", "description": "归档多少天前的关系，默认30天"} }, "required": [] } } }, { "type": "function", "function": { "name": "memory_cleanup", "description": "物理清理已删除状态超过90天的关系和孤立节点。谨慎使用。", "parameters": { "type": "object", "properties": { "dry_run": {"type": "boolean", "description": "仅预览不实际删除", "default": True} }, "required": [] } } } ] class Neo4jGraph: def __init__(self, uri: str, user: str, password: str): from neo4j import GraphDatabase self.driver = GraphDatabase.driver(uri, auth=(user, password)) def close(self): self.driver.close() def ensure_constraints(self): with self.driver.session() as session: session.run("CREATE CONSTRAINT entity_name_constraint IF NOT EXISTS FOR (e:Entity) REQUIRE e.name IS UNIQUE") session.run("CREATE CONSTRAINT session_id_constraint IF NOT EXISTS FOR (s:Session) REQUIRE s.session_id IS UNIQUE") session.run("CREATE INDEX rel_created_at IF NOT EXISTS FOR ()-[r:RELATES]-() ON r.created_at") session.run("CREATE INDEX rel_session_id IF NOT EXISTS FOR ()-[r:RELATES]-() ON r.session_id") session.run("CREATE INDEX rel_type IF NOT EXISTS FOR ()-[r:RELATES]-() ON r.type") session.run("CREATE INDEX rel_status IF NOT EXISTS FOR ()-[r:RELATES]-() ON r.status") session.run("CREATE INDEX rel_date_bucket IF NOT EXISTS FOR ()-[r:RELATES]-() ON r.date_bucket") session.run("CREATE INDEX entity_type IF NOT EXISTS FOR (e:Entity) ON e.type") session.run("CREATE INDEX entity_mention_count IF NOT EXISTS FOR (e:Entity) ON e.mention_count") def recall(self, query_intent: str, seed_entities: list = None, depth: int = 2, time_range: dict = None, session_filter: str = None) -> dict: with self.driver.session() as session: # 支持逗号分隔的多个关键词 keywords = [w.strip() for w in query_intent.replace(',', ' ').split() if len(w.strip()) > 0] # 如果没有查询条件，返回空结果 if not keywords and not seed_entities: return {"entities": [], "relations": [], "message": "无查询关键词"} # 默认查询所有会话的历史（不只是当前会话） # 只有明确指定 session_filter 才限制查询范围 params = {} cond_parts = ["r.status = 'active'"] if session_filter: cond_parts.append("r.session_id = $session_id") params["session_id"] = session_filter # 搜索多个相关关键词 if keywords: keyword_conditions = [] for k in keywords: k_lower = k.lower() # 搜索：实体名称、关系类型、目标实体 keyword_conditions.append(f"toLower(e.name) CONTAINS '{k_lower}'") keyword_conditions.append(f"toLower(t.name) CONTAINS '{k_lower}'") keyword_conditions.append(f"toLower(r.type) CONTAINS '{k_lower}'") cond_parts.append(f"({' OR '.join(keyword_conditions)})") if seed_entities: placeholders = ",".join([f"'{s}'" for s in seed_entities]) cond_parts.append(f"(e.name IN [{placeholders}] OR t.name IN [{placeholders}])") if time_range and "days" in time_range: cond_parts.append(f"r.created_at >= datetime() - duration('P{time_range['days']}D')") where_clause = " AND ".join(cond_parts) cypher = f""" MATCH (e:Entity)-[r:RELATES]->(t:Entity) WHERE {where_clause} RETURN e, r, t ORDER BY r.created_at DESC LIMIT 30 """ result = session.run(cypher, params) entities, relations = {}, [] for record in result: e, r, t = record["e"], record["r"], record["t"] if e["name"] not in entities: entities[e["name"]] = {"name": e["name"], "type": e.get("type", "unknown"), "mention_count": e.get("mention_count", 1)} if t["name"] not in entities: entities[t["name"]] = {"name": t["name"], "type": t.get("type", "unknown"), "mention_count": t.get("mention_count", 1)} relations.append({ "source": e["name"], "target": t["name"], "type": r["type"], "created_at": str(r.get("created_at", "")), "session_id": r.get("session_id", ""), "turn_id": r.get("turn_id", 0), "confidence": r.get("confidence", 1.0) }) return {"entities": list(entities.values()), "relations": relations[:20]} def commit(self, triplets: list, entity_types: list = None, temporal_tag: str = None) -> dict: global CURRENT_TURN with self.driver.session() as session: valid_triplets = [t for t in triplets if t.get("subject") and t.get("relation") and t.get("object")] if not valid_triplets: return {"committed_count": 0, "details": []} etype = entity_types[0] if entity_types else "unknown" date_bucket = temporal_tag or datetime.now().strftime("%Y-%m-%d") results = [] for triplet in valid_triplets: subject = triplet.get("subject", "").strip() relation = triplet.get("relation", "").strip() obj = triplet.get("object", "").strip() confidence = triplet.get("confidence", 0.9) session.run(""" MERGE (s:Entity {name: $subject}) ON CREATE SET s.type = $type, s.created_at = datetime(), s.mention_count = 1, s.updated_at = datetime() ON MATCH SET s.mention_count = coalesce(s.mention_count, 0) + 1, s.updated_at = datetime() MERGE (t:Entity {name: $object}) ON CREATE SET t.type = $type, t.created_at = datetime(), t.mention_count = 1, t.updated_at = datetime() ON MATCH SET t.mention_count = coalesce(t.mention_count, 0) + 1, t.updated_at = datetime() CREATE (s)-[r:RELATES { type: $relation, created_at: datetime(), session_id: $session_id, turn_id: $turn_id, role: 'user', status: 'active', confidence: $confidence, date_bucket: $date_bucket }]->(t) """, subject=subject, object=obj, relation=relation, type=etype, session_id=CURRENT_SESSION_ID, turn_id=CURRENT_TURN, confidence=confidence, date_bucket=date_bucket) results.append(f"{subject} -[{relation}]-> {obj}") return {"committed_count": len(results), "details": results} def purge(self, criteria: dict, mode: str = "soft", new_relation: dict = None) -> dict: with self.driver.session() as session: subject_pattern = criteria.get("subject_contains", "") rel_type = criteria.get("relation_type", "") target_pattern = criteria.get("target_contains", "") session_id = criteria.get("session_id", CURRENT_SESSION_ID) cond_parts = ["r.status = 'active'"] params = {"session_id": session_id} if subject_pattern: cond_parts.append("r.source CONTAINS $subject") params["subject"] = subject_pattern if target_pattern: cond_parts.append("r.target CONTAINS $target") params["target"] = target_pattern if rel_type: cond_parts.append("r.type = $rel_type") params["rel_type"] = rel_type where_clause = " AND ".join(cond_parts) if mode == "supersede" and new_relation: new_rel = new_relation.get("relation", "") new_target = new_relation.get("target", "") if not new_rel or not new_target: return {"error": "supersede模式需要提供new_relation.relation和new_relation.target"} result = session.run(f""" MATCH (s:Entity)-[r:RELATES]->(t:Entity) WHERE {where_clause} SET r.status = 'superseded', r.updated_at = datetime() RETURN id(r) as old_id, s.name as source """, params) deleted_count = 0 for record in result: old_id = record["old_id"] source = record["source"] session.run(""" MATCH (s:Entity {name: $source}) WHERE id(s) = $source_id CREATE (s)-[r:RELATES { type: $new_rel, created_at: datetime(), session_id: $session_id, turn_id: $turn_id, role: 'user', status: 'active', confidence: 0.9, date_bucket: date().isoDate, supersedes: $old_id }]->(t:Entity {name: $new_target}) """, source_id=record["s"].element_id, new_rel=new_rel, new_target=new_target, session_id=CURRENT_SESSION_ID, turn_id=CURRENT_TURN, old_id=old_id) deleted_count += 1 return {"deleted_count": deleted_count, "mode": "supersede", "new_relation": f"{new_relation.get('subject', '')} -[{new_rel}]-> {new_target}"} else: result = session.run(f""" MATCH ()-[r:RELATES]->() WHERE {where_clause} SET r.status = 'deleted', r.updated_at = datetime() RETURN count(r) as deleted """, params) count = result.single()["deleted"] return {"deleted_count": count, "mode": "soft"} def introspect(self, session_id: str = None) -> dict: target_session = session_id or CURRENT_SESSION_ID with self.driver.session() as session: result = session.run(""" MATCH (s:Entity)-[r:RELATES]->(t:Entity) WHERE r.session_id = $session_id AND r.status = 'active' RETURN collect(DISTINCT s.name) as source_entities, collect(DISTINCT t.name) as target_entities, count(r) as rel_count, collect(DISTINCT r.type) as rel_types """, session_id=target_session) record = result.single() result2 = session.run(""" MATCH (e:Entity) RETURN e.name as name, e.mention_count as count, e.type as type ORDER BY e.mention_count DESC LIMIT 10 """) hotspots = [(r["name"], r["count"], r["type"]) for r in result2] result3 = session.run(""" MATCH ()-[r:RELATES]->() WHERE r.session_id = $session_id RETURN r.type as type, count(*) as count ORDER BY count DESC """, session_id=target_session) relation_distribution = {r["type"]: r["count"] for r in result3} return { "session_id": target_session, "total_turns": CURRENT_TURN, "entities_discussed": list(set((record["source_entities"] or []) + (record["target_entities"] or []))), "relation_count": record["rel_count"] if record else 0, "relation_types": record["rel_types"] if record else [], "memory_hotspots": hotspots, "relation_distribution": relation_distribution } def archive(self, days: int = 30) -> dict: with self.driver.session() as session: result = session.run(""" MATCH ()-[r:RELATES]->() WHERE r.status = 'active' AND r.created_at < datetime() - duration('P' + $days + 'D') SET r.status = 'archived', r.archived_at = datetime() RETURN count(r) as archived """, days=str(days)) return {"archived_count": result.single()["archived"], "days": days} def cleanup(self, dry_run: bool = True) -> dict: with self.driver.session() as session: result1 = session.run(""" MATCH ()-[r:RELATES]->() WHERE r.status = 'deleted' AND r.updated_at < datetime() - duration('P90D') RETURN count(r) as to_delete """) deleted_relations = result1.single()["to_delete"] result2 = session.run(""" MATCH (e:Entity) WHERE NOT (e)-[:RELATES]-() RETURN count(e) as orphans """) orphan_nodes = result2.single()["orphans"] if not dry_run and deleted_relations > 0: session.run(""" MATCH ()-[r:RELATES]->() WHERE r.status = 'deleted' AND r.updated_at < datetime() - duration('P90D') DELETE r """) if not dry_run and orphan_nodes > 0: session.run(""" MATCH (e:Entity) WHERE NOT (e)-[:RELATES]-() DELETE e """) return { "dry_run": dry_run, "deleted_relations": deleted_relations, "orphan_nodes": orphan_nodes, "action_taken": not dry_run } def execute_tool(graph: Neo4jGraph, tool_name: str, arguments: dict) -> str: print(f"\n[工具调用] {tool_name}") print(f"[参数] {json.dumps(arguments, ensure_ascii=False, indent=2)}") try: if tool_name == "memory_recall": result = graph.recall( query_intent=arguments.get("query_intent", ""), seed_entities=arguments.get("seed_entities"), depth=arguments.get("depth", 2), time_range=arguments.get("time_range"), session_filter=arguments.get("session_filter") ) return format_recall_result(result) elif tool_name == "memory_commit": result = graph.commit( triplets=arguments.get("triplets", []), entity_types=arguments.get("entity_types"), temporal_tag=arguments.get("temporal_tag") ) return json.dumps(result, ensure_ascii=False, default=str) elif tool_name == "memory_purge": result = graph.purge( criteria=arguments.get("criteria", {}), mode=arguments.get("mode", "soft"), new_relation=arguments.get("new_relation") ) return json.dumps(result, ensure_ascii=False, default=str) elif tool_name == "memory_introspect": result = graph.introspect(session_id=arguments.get("session_id")) return json.dumps(result, ensure_ascii=False, default=str) elif tool_name == "memory_archive": result = graph.archive(days=arguments.get("days", 30)) return json.dumps(result, ensure_ascii=False, default=str) elif tool_name == "memory_cleanup": result = graph.cleanup(dry_run=arguments.get("dry_run", True)) return json.dumps(result, ensure_ascii=False, default=str) return f"未知工具: {tool_name}" except Exception as e: return f"工具执行错误: {str(e)}" def format_recall_result(result: dict) -> str: lines = ["===== 图数据库检索结果 ====="] if result.get("entities"): lines.append(f"\n相关实体 ({len(result['entities'])} 个):") for e in result["entities"]: lines.append(f" - {e['name']} (类型: {e.get('type', 'unknown')}, 提及: {e.get('mention_count', 1)}次)") if result.get("relations"): lines.append(f"\n相关关系 ({len(result['relations'])} 条):") for r in result["relations"]: lines.append(f" - {r['source']} --[{r['type']}]--> {r['target']}") created = r.get("created_at", "N/A") if created and created != "N/A": created = created[:19] if "T" in str(created) else str(created) lines.append(f" 时间: {created}, 会话: {r.get('session_id', 'N/A')[:20]}, 轮次: {r.get('turn_id', 0)}, 置信度: {r.get('confidence', 1.0)}") if not result.get("entities") and not result.get("relations"): lines.append("\n(未找到相关记忆)") lines.append("=" * 35) return "\n".join(lines) class GraphMemoryClient: def __init__(self, api_key: str, base_url: str, graph: Neo4jGraph): from openai import OpenAI self.client = OpenAI(api_key=api_key, base_url=base_url) self.graph = graph self.tools = TOOLS self.system_prompt = self._build_system_prompt() def _build_system_prompt(self) -> str: return """你是图数据库记忆助手。 ## 核心职责 你是用户的长期记忆助手。每次对话后，你**必须**主动决定是否需要将关键信息写入记忆图库。 ## 多轮查询策略 **允许多轮查询**，但必须遵循以下规则： 1. **渐进式查询**：每轮查询应该基于上一轮的结果，缩小或扩大范围 - 第一轮：广泛搜索，使用多个同义词 - 第二轮：基于第一轮结果，精确搜索 - 第三轮：如果仍未找到，尝试相关概念 2. **禁止重复查询**： - ❌ 禁止：使用相同的 query_intent 连续查询 - ❌ 禁止：查询后立即用相同关键词再查 - ✅ 允许：第一轮查"鸿蒙"，第二轮查"鸿蒙,工具链,IDE" 3. **查询历史追踪**： - 记住已经查询过的关键词 - 每次新查询必须使用不同的关键词组合 - 如果3轮查询仍未找到，告知用户"未找到相关记忆" ## memory_recall 正确用法 ### 关键词提取规则 query_intent 应该是**逗号分隔的多个关键词**，包含**同义词/近义词**： ```json { "query_intent": "鸿蒙,harmony,工具链,toolchain,开发环境,IDE", "depth": 2 } ``` ### 搜索范围 - 实体名称（subject/target） - 关系类型（relation） - 实体类型（entity type） ### 同义词扩展示例 - "鸿蒙" → "鸿蒙,harmony,openharmony,华为" - "工具链" → "工具链,toolchain,sdk,开发环境,IDE" - "项目" → "项目,project,工程,工作" - "学习" → "学习,learn,study,掌握,了解" ## 重要规则：必须写入记忆的情况 当用户提到以下内容时，你**必须**调用 memory_commit 写入记忆： 1. 用户的**偏好**（"我喜欢X"） 2. 用户的**项目**（"我在做X项目"） 3. 用户的**学习内容**（"我在学Python"） 4. 讨论的**主题**（"量子力学"） 5. 用户的**计划**（"我打算X"） 6. 用户的**状态**（"我现在在X"） ## 区分事实与猜测 当基于记忆检索结果回复时，**必须**使用"应该"标注你的推理： - ✅ 正确: "根据记忆，你的鸿蒙工具链**应该**在 opt 目录下" - ❌ 错误: "你的鸿蒙工具链在 opt 目录下"（没有标注"应该"） 原因：数据库中的记录可能不完整或已过期，你需要标注这是**推断**而非**确认**的事实 ## 可用工具 1. **memory_recall** - 检索历史记忆 - query_intent: 支持逗号分隔的多关键词 - depth: 搜索深度（1-3） - seed_entities: 种子实体（可选） - time_range: 时间范围（可选） 2. **memory_commit** - 写入记忆（三元组格式） - triplets: [{"subject": "A", "relation": "关系", "object": "B"}] - entity_types: 实体类型标注（可选） - temporal_tag: 时间标签（可选） 3. **memory_purge** - 修正/删除记忆 - criteria: 删除条件 - mode: "soft" 或 "hard" 4. **memory_introspect** - 查看会话状态 ## 错误策略（禁止） - ❌ query_intent 使用完整句子 - ❌ 连续使用相同的 query_intent 查询 - ❌ 查询后立即用相同关键词再查 - ❌ 超过3轮查询仍未找到结果时继续查询 ## 查询示例 ### 正确的多轮查询 ``` 用户: 我的鸿蒙开发环境在哪？ 第一轮查询: { "query_intent": "鸿蒙,harmony,开发环境,IDE,工具链", "depth": 2 } 如果未找到，第二轮查询: { "query_intent": "鸿蒙,harmony,安装路径,目录,位置", "depth": 1 } 如果仍未找到，告知用户并询问是否需要记录。 ``` ### 错误的重复查询 ``` ❌ 第一轮: {"query_intent": "鸿蒙"} ❌ 第二轮: {"query_intent": "鸿蒙"} // 禁止重复！ ``` 现在开始对话！""" def send_message(self, user_input: str, tool_results: list = None, assistant_msg: dict = None) -> dict: global CURRENT_TURN messages = [{"role": "system", "content": self.system_prompt}] # 添加之前的 assistant 消息（包含 tool_calls） if assistant_msg: messages.append(assistant_msg) # 添加之前的工具结果 if tool_results: messages.extend(tool_results) # 添加当前用户输入 messages.append({"role": "user", "content": user_input}) response = self.client.chat.completions.create( model=MODEL_NAME, messages=messages, tools=self.tools, tool_choice="auto" ) return response def chat_loop(self): global CURRENT_TURN print("\n" + "=" * 60) print("Graph Memory Demo - 纯图数据库对话 (Neo4j)") print("=" * 60) print(f"会话ID: {CURRENT_SESSION_ID}") print(f"Neo4j: {NEO4J_URI}") print("输入 quit/exit 退出") print("=" * 60 + "\n") while True: try: user_input = input("\n[你] ").strip() if not user_input: continue if user_input.lower() in ["quit", "exit", "退出"]: print("\n[系统] 再见！") break CURRENT_TURN += 1 print(f"\n[轮次 {CURRENT_TURN}] 发送请求...") # 用于累积工具结果 tool_results = [] last_assistant_msg = None # 首次请求 response = self.send_message(user_input, []) message = response.choices[0].message # 处理工具调用循环 - 持续处理直到没有新的 tool_calls while message.tool_calls: # 打印模型响应（如果有） if message.content: print(f"\n[模型] {message.content}") # 保存包含 tool_calls 的 assistant 消息（只保留最后一个） last_assistant_msg = { "role": "assistant", "content": message.content, "type": "message", "tool_calls": [{"id": tc.id, "type": "function", "function": {"name": tc.function.name, "arguments": tc.function.arguments}} for tc in message.tool_calls] } # 执行当前轮的所有工具调用 current_tool_results = [] for tool_call in message.tool_calls: tool_name = tool_call.function.name tool_args = json.loads(tool_call.function.arguments) tool_id = tool_call.id result = execute_tool(self.graph, tool_name, tool_args) print(f"\n[工具结果] {result}") current_tool_results.append({ "role": "tool", "tool_call_id": tool_id, "content": result }) # 继续调用 - 只发送当前轮的 assistant 消息和工具结果 messages = [ {"role": "system", "content": self.system_prompt}, last_assistant_msg, ] messages.extend(current_tool_results) messages.append({"role": "user", "content": user_input}) response = self.client.chat.completions.create( model=MODEL_NAME, messages=messages, tools=self.tools ) message = response.choices[0].message # 最终回复 final_content = message.content or "(无回复)" print(f"\n[模型] {final_content}") except KeyboardInterrupt: print("\n\n[系统] 中断退出") break except Exception as e: print(f"\n[错误] {str(e)}") def main(): print("Graph Memory Demo - 纯图数据库调用的多轮对话") print("-" * 40) if not DEEPSEEK_API_KEY: print("错误: 请设置 DEEPSEEK_API_KEY 环境变量") print(" export DEEPSEEK_API_KEY='your-actual-key'") return print(f"Neo4j 配置: {NEO4J_URI}") print(f"Neo4j 用户: {NEO4J_USER}") print(f"Neo4j 密码: {NEO4J_PASSWORD[:4] if NEO4J_PASSWORD else 'None'}***") print(f"DeepSeek API: {DEEPSEEK_API_KEY[:8]}...") print() try: graph = Neo4jGraph(NEO4J_URI, NEO4J_USER, NEO4J_PASSWORD) graph.ensure_constraints() print("[Info] Neo4j 连接成功\n") except Exception as e: print(f"[Error] Neo4j 连接失败: {e}") print("请确保 Neo4j 已启动，或运行 scripts/ 下的安装脚本") return client = GraphMemoryClient(DEEPSEEK_API_KEY, DEEPSEEK_BASE_URL, graph) client.chat_loop() graph.close() if __name__ == "__main__": main()