LangChain-10(2) 加餐 编写Agent获取本地Docker运行情况 无技术含量只是思路 原创

可以先查看 上一节内容，会对本节有更好的理解。

安装依赖

pip install langchainhub

编写代码

核心代码

@tool
def get_docker_info(docker_name: str) -> str:
    """Get information about a docker pod container info."""
    result = subprocess.run(['docker', 'inspect', str(docker_name)], capture_output=True, text=True)
    return result.stdout

这里是通过执行 Shell的方式来获取状态的。
通过执行Docker指令之后，可以获取到一大段的文本内容，此时把这些内容交给大模型去处理，大模型对内容进行提取和推理，最终回答我们。

• 注意@tool注解，没有这个注解的话，无法使用
• 注意要写"""xxx""" 要写明该工具的介绍，大模型将根据介绍来选择是否调用
• 如果3.5的效果不好，可以尝试使用4

from langchain import hub
from langchain.agents import AgentExecutor, tool
from langchain.agents.output_parsers import XMLAgentOutputParser
from langchain_openai import ChatOpenAI
import subprocess


model = ChatOpenAI(
    model="gpt-3.5-turbo",
)


@tool
def search(query: str) -> str:
    """Search things about current events."""
    return "32 degrees"


@tool
def get_docker_info(docker_name: str) -> str:
    """Get information about a docker pod container info."""
    result = subprocess.run(['docker', 'inspect', str(docker_name)], capture_output=True, text=True)
    return result.stdout


tool_list = [search, get_docker_info]
# Get the prompt to use - you can modify this!
prompt = hub.pull("hwchase17/xml-agent-convo")


# Logic for going from intermediate steps to a string to pass into model
# This is pretty tied to the prompt
def convert_intermediate_steps(intermediate_steps):
    log = ""
    for action, observation in intermediate_steps:
        log += (
            f"<tool>{action.tool}</tool><tool_input>{action.tool_input}"
            f"</tool_input><observation>{observation}</observation>"
        )
    return log


# Logic for converting tools to string to go in prompt
def convert_tools(tools):
    return "\n".join([f"{tool.name}: {tool.description}" for tool in tools])


agent = (
    {
        "input": lambda x: x["input"],
        "agent_scratchpad": lambda x: convert_intermediate_steps(
            x["intermediate_steps"]
        ),
    }
    | prompt.partial(tools=convert_tools(tool_list))
    | model.bind(stop=["</tool_input>", "</final_answer>"])
    | XMLAgentOutputParser()
)

agent_executor = AgentExecutor(agent=agent, tools=tool_list)
message1 = agent_executor.invoke({"input": "whats the weather in New york?"})
print(f"message1: {message1}")

message2 = agent_executor.invoke({"input": "what is docker pod which name 'lobe-chat-wzk' info? I want to know it 'Image' url"})
print(f"message2: {message2}")

执行代码

➜ python3 test10.py
message1: {'input': 'whats the weather in New york?', 'output': 'The weather in New York is 32 degrees'}
message2: {'input': "what is docker pod which name 'lobe-chat-wzk' info? I want to know it 'Image' url", 'output': 'The Image URL for the docker pod named \'lobe-chat-wzk\' is "lobehub/lobe-chat"'}