64 lines
1.6 KiB
Python
64 lines
1.6 KiB
Python
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"""
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资讯子图构建器
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News Analysis Subgraph Builder
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"""
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from langgraph.graph import StateGraph, START, END
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from .state import NewsAnalysisState
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from .nodes import (
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parse_intent,
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query_news,
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analyze_url,
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extract_keywords,
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generate_report,
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format_result,
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should_continue
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)
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def build_news_analysis_subgraph() -> StateGraph:
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"""
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构建资讯子图
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Returns:
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配置好的 StateGraph
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"""
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# 创建图
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graph = StateGraph(NewsAnalysisState)
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# 添加节点
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graph.add_node("parse_intent", parse_intent)
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graph.add_node("query_news", query_news)
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graph.add_node("analyze_url", analyze_url)
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graph.add_node("extract_keywords", extract_keywords)
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graph.add_node("generate_report", generate_report)
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graph.add_node("format_result", format_result)
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# 添加边
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# 从START开始
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graph.add_edge(START, "parse_intent")
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# 从parse_intent根据条件路由
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graph.add_conditional_edges(
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"parse_intent",
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should_continue,
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{
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"query_news": "query_news",
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"analyze_url": "analyze_url",
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"extract_keywords": "extract_keywords",
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"generate_report": "generate_report",
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}
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)
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# 从各个操作节点到format_result
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graph.add_edge("query_news", "format_result")
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graph.add_edge("analyze_url", "format_result")
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graph.add_edge("extract_keywords", "format_result")
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graph.add_edge("generate_report", "format_result")
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# 最终到END
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graph.add_edge("format_result", END)
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return graph
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