79 lines
2.6 KiB
Python
79 lines
2.6 KiB
Python
"""基于当前大屏和澄清历史回答问题"""
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from langchain_core.messages import HumanMessage, SystemMessage
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from langchain_core.output_parsers import StrOutputParser
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from app.clients.llm import get_llm
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from app.processor.base import BaseNode
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from app.processor.state import QueryState
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from app.prompt.qa import QA_SYSTEM_PROMPT
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class QANode(BaseNode):
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name = "qa_node"
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async def process(self, state: QueryState) -> QueryState:
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updated_state: QueryState = state.copy()
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llm_client = get_llm()
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llm_res = await llm_client.ainvoke(
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[
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SystemMessage(content=QA_SYSTEM_PROMPT),
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HumanMessage(
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content=state["input_context"].model_dump_json(exclude_unset=True)
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),
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]
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)
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# 普通文本输出，同时兼容模型返回的文本内容块
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answer = StrOutputParser().invoke(llm_res).strip()
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if not answer:
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raise ValueError("问答模型未返回文本回答")
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updated_state["answer"] = answer
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return updated_state
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if __name__ == "__main__":
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import asyncio
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import json
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from pydantic import BaseModel
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from app.processor.nodes.input_node import InputNode
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async def main():
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# 直接测试问答，仅需 LLM 配置
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state: QueryState = {
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"request": {
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"prompt": "销售额统计的展示可以怎么优化？先给建议，不要修改",
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"screen": {
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"canvas": {"width": 1920, "height": 1080},
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"nodes": [
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{
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"id": "sales-chart",
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"type": "bar-chart",
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"name": "销售额统计",
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"layout": {"x": 26, "y": 34.8, "width": 400, "height": 260},
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"props": {"option": {"title": {"text": "销售额统计"}}},
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}
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],
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},
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"context": {"selected_node_ids": ["sales-chart"]},
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}
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}
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state = InputNode().process(state)
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node = QANode()
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final_state = await node.process(state)
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print(
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json.dumps(
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{
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key: value.model_dump(mode="json")
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if isinstance(value, BaseModel)
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else value
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for key, value in final_state.items()
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},
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ensure_ascii=False,
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indent=2,
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)
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)
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asyncio.run(main())
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