44 lines
978 B
Python
44 lines
978 B
Python
"""
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Example using the sugar: create_qwen_react_agent(...)
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Prereqs:
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uv pip install -e '.[openai,custom]'
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Env:
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export QWEN_API_KEY=sk-...
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export QWEN_BASE_URL=https://dashscope-intl.aliyuncs.com/compatible-mode/v1
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export QWEN_MODEL=qwen3-coder-flash
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"""
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from langchain_core.messages import HumanMessage
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try:
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from langchain.tools import tool
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except Exception:
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from langchain_core.tools import tool # type: ignore
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from langgraph_qwen import create_qwen_react_agent
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@tool
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def echo(text: str) -> str:
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"""Echo back the given text."""
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return text
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def main():
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agent = create_qwen_react_agent(
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[echo],
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prefer="custom", # use our custom BaseChatModel by default
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model_kwargs={"temperature": 0},
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)
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res = agent.invoke({"messages": [HumanMessage(content="调用 echo 工具返回：你好，LangGraph！")]})
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print("\n=== Final ===\n")
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print(res["messages"][-1].content)
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if __name__ == "__main__":
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main()
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