Delete agent.py

agent.py

@@ -1,231 +0,0 @@
-import os
-import time
-import json
-from dotenv import load_dotenv
-from langgraph.graph import StateGraph, END
-from langchain_google_genai import ChatGoogleGenerativeAI
-from langchain_community.tools import DuckDuckGoSearchRun
-from langchain_community.document_loaders import WikipediaLoader, ArxivLoader
-from langchain_core.messages import SystemMessage, AIMessage, HumanMessage
-from langchain_core.tools import tool
-from tenacity import retry, stop_after_attempt, wait_exponential
-from typing import TypedDict, Annotated, Sequence
-import operator
-
-# Load environment variables
-load_dotenv()
-google_api_key = os.getenv("GOOGLE_API_KEY") or os.environ.get("GOOGLE_API_KEY")
-if not google_api_key:
-    raise ValueError("Missing GOOGLE_API_KEY environment variable")
-
-# --- Math Tools ---
-@tool
-def multiply(a: int, b: int) -> int:
-    """Multiply two integers."""
-    return a * b
-
-@tool
-def add(a: int, b: int) -> int:
-    """Add two integers."""
-    return a + b
-
-@tool
-def subtract(a: int, b: int) -> int:
-    """Subtract b from a."""
-    return a - b
-
-@tool
-def divide(a: int, b: int) -> float:
-    """Divide a by b, error on zero."""
-    if b == 0:
-        raise ValueError("Cannot divide by zero.")
-    return a / b
-
-@tool
-def modulus(a: int, b: int) -> int:
-    """Compute a mod b."""
-    return a % b
-
-# --- Browser Tools ---
-@tool
-def wiki_search(query: str) -> str:
-    """Search Wikipedia and return up to 3 relevant documents."""
-    try:
-        docs = WikipediaLoader(query=query, load_max_docs=3).load()
-        if not docs:
-            return "No Wikipedia results found."
-        
-        results = []
-        for doc in docs:
-            title = doc.metadata.get('title', 'Unknown Title')
-            content = doc.page_content[:2000]  # Limit content length
-            results.append(f"Title: {title}\nContent: {content}")
-        
-        return "\n\n---\n\n".join(results)
-    except Exception as e:
-        return f"Wikipedia search error: {str(e)}"
-
-@tool
-def arxiv_search(query: str) -> str:
-    """Search Arxiv and return up to 3 relevant papers."""
-    try:
-        docs = ArxivLoader(query=query, load_max_docs=3).load()
-        if not docs:
-            return "No arXiv papers found."
-        
-        results = []
-        for doc in docs:
-            title = doc.metadata.get('Title', 'Unknown Title')
-            authors = ", ".join(doc.metadata.get('Authors', []))
-            content = doc.page_content[:2000]  # Limit content length
-            results.append(f"Title: {title}\nAuthors: {authors}\nContent: {content}")
-        
-        return "\n\n---\n\n".join(results)
-    except Exception as e:
-        return f"arXiv search error: {str(e)}"
-
-@tool
-def web_search(query: str) -> str:
-    """Search the web using DuckDuckGo and return top results."""
-    try:
-        search = DuckDuckGoSearchRun()
-        result = search.run(query)
-        return f"Web search results for '{query}':\n{result[:2000]}"  # Limit content length
-    except Exception as e:
-        return f"Web search error: {str(e)}"
-
-# --- Load system prompt ---
-with open("system_prompt.txt", "r", encoding="utf-8") as f:
-    system_prompt = f.read()
-
-# --- Tool Setup ---
-tools = [
-    multiply,
-    add,
-    subtract,
-    divide,
-    modulus,
-    wiki_search,
-    arxiv_search,
-    web_search,
-]
-
-# --- Graph Builder ---
-def build_graph():
-    # Initialize model with Gemini 2.5 Flash
-    llm = ChatGoogleGenerativeAI(
-        model="gemini-2.5-flash",
-        temperature=0.3,
-        google_api_key=google_api_key,
-        max_retries=3
-    )
-    
-    # Bind tools to LLM
-    llm_with_tools = llm.bind_tools(tools)
-    
-    # 1. 定义状态结构
-    class AgentState(TypedDict):
-        messages: Annotated[Sequence, operator.add]
-    
-    # 2. 创建图
-    workflow = StateGraph(AgentState)
-    
-    # 3. 定义节点函数
-    def agent_node(state: AgentState):
-        """主代理节点"""
-        try:
-            # 添加请求间隔
-            time.sleep(1)
-            
-            # 带重试的调用
-            @retry(stop=stop_after_attempt(3),
-                   wait=wait_exponential(multiplier=1, min=4, max=10))
-            def invoke_with_retry():
-                return llm_with_tools.invoke(state["messages"])
-            
-            response = invoke_with_retry()
-            return {"messages": [response]}
-        
-        except Exception as e:
-            error_type = "UNKNOWN"
-            if "429" in str(e):
-                error_type = "QUOTA_EXCEEDED"
-            elif "400" in str(e):
-                error_type = "INVALID_REQUEST"
-                
-            error_msg = f"AGENT ERROR ({error_type}): {str(e)[:200]}"
-            return {"messages": [AIMessage(content=error_msg)]}
-    
-    def tool_node(state: AgentState):
-        """工具执行节点"""
-        last_msg = state["messages"][-1]
-        tool_calls = last_msg.additional_kwargs.get("tool_calls", [])
-        
-        responses = []
-        for call in tool_calls:
-            tool_name = call["function"]["name"]
-            tool_args = call["function"].get("arguments", {})
-            
-            # 查找工具
-            tool_func = next((t for t in tools if t.name == tool_name), None)
-            if not tool_func:
-                responses.append(f"Tool {tool_name} not available")
-                continue
-            
-            try:
-                # 解析参数
-                if isinstance(tool_args, str):
-                    tool_args = json.loads(tool_args)
-                
-                # 执行工具
-                result = tool_func.invoke(tool_args)
-                responses.append(f"{tool_name} result: {result[:1000]}")  # 限制结果长度
-            except Exception as e:
-                responses.append(f"{tool_name} error: {str(e)}")
-        
-        return {"messages": [AIMessage(content="\n".join(responses)]}
-    
-    # 4. 添加节点到工作流
-    workflow.add_node("agent", agent_node)
-    workflow.add_node("tools", tool_node)
-    
-    # 5. 设置入口点
-    workflow.set_entry_point("agent")
-    
-    # 6. 定义条件边
-    def should_continue(state: AgentState):
-        last_msg = state["messages"][-1]
-        
-        # 错误情况直接结束
-        if "AGENT ERROR" in last_msg.content:
-            return "end"
-        
-        # 有工具调用则转到工具节点
-        if hasattr(last_msg, "tool_calls") and last_msg.tool_calls:
-            return "tools"
-        
-        # 包含最终答案则结束
-        if "FINAL ANSWER" in last_msg.content:
-            return "end"
-            
-        # 其他情况继续代理处理
-        return "agent"
-    
-    workflow.add_conditional_edges(
-        "agent",
-        should_continue,
-        {
-            "agent": "agent",
-            "tools": "tools",
-            "end": END
-        }
-    )
-    
-    # 7. 定义工具节点后的流向
-    workflow.add_edge("tools", "agent")
-    
-    # 8. 编译图
-    return workflow.compile()
-
-# 初始化代理图
-agent_graph = build_graph()