54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
import os
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import asyncio
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from langchain_openai import ChatOpenAI
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from langchain_core.messages import HumanMessage
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from langchain.tools import tool
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from deepagents import create_deep_agent
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from deepagents.backends import FilesystemBackend, LocalShellBackend, CompositeBackend
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# LLM setup
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llm = ChatOpenAI(
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model="openai/gpt-oss-20b:free",
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base_url="https://openrouter.ai/api/v1",
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api_key=os.getenv("OPENAI_API_KEY"),
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temperature=0.0,
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)
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# Backend: virtual FS + real shell
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backend = CompositeBackend([
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LocalShellBackend(workspace_dir="./workspace"),
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FilesystemBackend(),
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])
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# Web search tool using duckduckgo-search
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@tool
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def web_search(query: str) -> str:
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"""Search the web for information."""
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try:
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from duckduckgo_search import DDGS
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with DDGS() as ddgs:
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results = list(ddgs.text(query, max_results=5))
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return "\n".join(f"{r['title']}: {r['body']}" for r in results)
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except Exception as e:
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return f"Search error: {e}"
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# Create deep agent
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agent = create_deep_agent(
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llm=llm,
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tools=[web_search],
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backend=backend,
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system_prompt="You are a helpful research agent.",
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)
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async def main():
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# Example query
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query = "Python async programming"
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result = await agent.ainvoke(
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{"messages": [HumanMessage(content=f"Search for {query}")]},
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{"configurable": {"thread_id": "session-1"}},
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)
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print(result["messages"][-1].content)
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if __name__ == "__main__":
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asyncio.run(main())
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