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- #!/usr/bin/env python3
- # -*- coding: utf-8 -*-
- """
- 代码示例 03: WorkingMemory实现详解
- 展示工作记忆的混合检索策略和TTL机制
- """
- import time
- from datetime import datetime, timedelta
- from typing import List, Dict, Any
- from hello_agents.tools import MemoryTool
- from hello_agents.memory import MemoryItem
- class WorkingMemoryDemo:
- """工作记忆演示类"""
-
- def __init__(self):
- self.memory_tool = MemoryTool(
- user_id="working_memory_demo",
- memory_types=["working"] # 只启用工作记忆
- )
-
- def demonstrate_capacity_management(self):
- """演示容量管理和TTL机制"""
- print("🧠 工作记忆容量管理演示")
- print("=" * 50)
-
- print("工作记忆特点:")
- print("• 容量有限(默认50条)")
- print("• TTL机制(默认60分钟)")
- print("• 自动清理过期记忆")
- print("• 优先级管理(重要性排序)")
-
- # 添加多条记忆来演示容量管理
- print(f"\n📝 添加测试记忆...")
- for i in range(10):
- importance = 0.3 + (i * 0.07) # 递增重要性
- self.memory_tool.execute("add",
- content=f"工作记忆测试项目 {i+1} - 重要性 {importance:.2f}",
- memory_type="working",
- importance=importance,
- test_id=i+1,
- category="capacity_test"
- )
-
- # 查看当前状态
- stats = self.memory_tool.execute("stats")
- print(f"当前状态: {stats}")
-
- # 演示重要性排序
- print(f"\n🔍 按重要性搜索:")
- result = self.memory_tool.execute("search",
- query="测试项目",
- memory_type="working",
- limit=5
- )
- print(result)
-
- def demonstrate_mixed_retrieval_strategy(self):
- """演示混合检索策略"""
- print("\n🔍 混合检索策略演示")
- print("-" * 40)
-
- print("混合检索策略包括:")
- print("• TF-IDF向量化语义检索")
- print("• 关键词匹配检索")
- print("• 时间衰减因子")
- print("• 重要性权重调整")
-
- # 添加不同类型的记忆用于检索测试
- test_memories = [
- {
- "content": "Python是一种高级编程语言,语法简洁清晰",
- "importance": 0.8,
- "topic": "programming",
- "language": "python"
- },
- {
- "content": "机器学习是人工智能的重要分支,包括监督学习和无监督学习",
- "importance": 0.9,
- "topic": "ai",
- "domain": "machine_learning"
- },
- {
- "content": "数据结构包括数组、链表、栈、队列等基本结构",
- "importance": 0.7,
- "topic": "computer_science",
- "category": "data_structures"
- },
- {
- "content": "算法复杂度分析使用大O记号来描述时间和空间复杂度",
- "importance": 0.8,
- "topic": "algorithms",
- "analysis": "complexity"
- }
- ]
-
- print(f"\n📝 添加测试记忆...")
- for i, memory in enumerate(test_memories):
- content = memory.pop("content")
- importance = memory.pop("importance")
- self.memory_tool.execute("add",
- content=content,
- memory_type="working",
- importance=importance,
- **memory
- )
-
- # 测试不同类型的检索
- search_tests = [
- ("Python编程", "测试语义匹配"),
- ("学习", "测试关键词匹配"),
- ("复杂度", "测试部分匹配"),
- ("人工智能机器学习", "测试多词匹配")
- ]
-
- print(f"\n🔍 混合检索测试:")
- for query, description in search_tests:
- print(f"\n查询: '{query}' ({description})")
- result = self.memory_tool.execute("search",
- query=query,
- memory_type="working",
- limit=2
- )
- print(f"结果: {result}")
-
- def demonstrate_time_decay_mechanism(self):
- """演示时间衰减机制"""
- print("\n⏰ 时间衰减机制演示")
- print("-" * 40)
-
- print("时间衰减机制:")
- print("• 新记忆权重更高")
- print("• 旧记忆权重衰减")
- print("• 模拟人类记忆特点")
- print("• 平衡新旧信息重要性")
-
- # 添加不同时间的记忆(模拟)
- time_test_memories = [
- ("最新的重要信息 - 刚刚学习的概念", 0.7, "newest"),
- ("较新的信息 - 昨天学习的内容", 0.7, "recent"),
- ("较旧的信息 - 上周学习的内容", 0.7, "older"),
- ("最旧的信息 - 很久以前的内容", 0.7, "oldest")
- ]
-
- print(f"\n📝 添加不同时期的记忆...")
- for content, importance, age_category in time_test_memories:
- self.memory_tool.execute("add",
- content=content,
- memory_type="working",
- importance=importance,
- age_category=age_category,
- timestamp_category=age_category
- )
-
- # 搜索测试时间衰减效果
- print(f"\n🔍 时间衰减效果测试:")
- result = self.memory_tool.execute("search",
- query="学习的内容",
- memory_type="working",
- limit=4
- )
- print("搜索结果(注意时间因素对排序的影响):")
- print(result)
-
- def demonstrate_automatic_cleanup(self):
- """演示自动清理机制"""
- print("\n🧹 自动清理机制演示")
- print("-" * 40)
-
- print("自动清理机制:")
- print("• 过期记忆自动清理")
- print("• 容量超限时清理低优先级记忆")
- print("• 保持系统性能和响应速度")
- print("• 模拟工作记忆的有限容量")
-
- # 获取清理前的状态
- stats_before = self.memory_tool.execute("stats")
- print(f"\n清理前状态: {stats_before}")
-
- # 添加一些低重要性的记忆
- print(f"\n📝 添加低重要性记忆...")
- for i in range(5):
- self.memory_tool.execute("add",
- content=f"低重要性临时记忆 {i+1}",
- memory_type="working",
- importance=0.1 + i * 0.05,
- temporary=True,
- cleanup_test=True
- )
-
- # 触发基于重要性的清理
- print(f"\n🧹 执行基于重要性的清理...")
- cleanup_result = self.memory_tool.execute("forget",
- strategy="importance_based",
- threshold=0.3
- )
- print(f"清理结果: {cleanup_result}")
-
- # 获取清理后的状态
- stats_after = self.memory_tool.execute("stats")
- print(f"\n清理后状态: {stats_after}")
-
- def demonstrate_performance_characteristics(self):
- """演示性能特征"""
- print("\n⚡ 性能特征演示")
- print("-" * 40)
-
- print("工作记忆性能特点:")
- print("• 纯内存存储,访问速度极快")
- print("• 无需磁盘I/O,响应时间短")
- print("• 适合频繁访问的临时数据")
- print("• 系统重启后数据丢失(符合设计)")
-
- # 性能测试
- print(f"\n⏱️ 性能测试:")
-
- # 批量添加测试
- start_time = time.time()
- for i in range(20):
- self.memory_tool.execute("add",
- content=f"性能测试记忆 {i+1}",
- memory_type="working",
- importance=0.5,
- performance_test=True
- )
- add_time = time.time() - start_time
- print(f"批量添加20条记忆耗时: {add_time:.3f}秒")
-
- # 批量搜索测试
- start_time = time.time()
- for i in range(10):
- self.memory_tool.execute("search",
- query=f"性能测试",
- memory_type="working",
- limit=3
- )
- search_time = time.time() - start_time
- print(f"批量搜索10次耗时: {search_time:.3f}秒")
-
- # 获取最终统计
- final_stats = self.memory_tool.execute("stats")
- print(f"\n📊 最终统计: {final_stats}")
- def main():
- """主函数"""
- print("🧠 WorkingMemory实现详解")
- print("展示工作记忆的核心特性和实现机制")
- print("=" * 60)
-
- try:
- demo = WorkingMemoryDemo()
-
- # 1. 容量管理演示
- demo.demonstrate_capacity_management()
-
- # 2. 混合检索策略演示
- demo.demonstrate_mixed_retrieval_strategy()
-
- # 3. 时间衰减机制演示
- demo.demonstrate_time_decay_mechanism()
-
- # 4. 自动清理机制演示
- demo.demonstrate_automatic_cleanup()
-
- # 5. 性能特征演示
- demo.demonstrate_performance_characteristics()
-
- print("\n" + "=" * 60)
- print("🎉 WorkingMemory实现演示完成!")
- print("=" * 60)
-
- print("\n✨ 工作记忆核心特性:")
- print("1. 🧠 有限容量 - 模拟人类工作记忆限制")
- print("2. ⚡ 高速访问 - 纯内存存储,响应迅速")
- print("3. 🔍 混合检索 - 语义+关键词+时间+重要性")
- print("4. ⏰ 时间衰减 - 新信息优先,旧信息衰减")
- print("5. 🧹 自动清理 - TTL机制+优先级管理")
-
- print("\n🎯 设计理念:")
- print("• 临时性 - 存储当前会话的临时信息")
- print("• 高效性 - 快速访问和处理能力")
- print("• 智能性 - 自动管理和优化策略")
- print("• 仿生性 - 模拟人类工作记忆特点")
-
- except Exception as e:
- print(f"\n❌ 演示过程中发生错误: {e}")
- import traceback
- traceback.print_exc()
- if __name__ == "__main__":
- main()
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