Shell (bash)
赋予智能体 Shell 访问权限非常强大（但在沙盒环境之外存在风险）。
LLM 可以使用它来执行任何 Shell 命令。一个常见的用例是让 LLM 与您的本地文件系统交互。
注意：Shell 工具不适用于 Windows 操作系统。
%pip install --upgrade --quiet langchain-community
from langchain_community.tools import ShellTool
shell_tool = ShellTool()
API 参考：ShellTool
print(shell_tool.run({"commands": ["echo 'Hello World!'", "time"]}))
Hello World!
real 0m0.000s
user 0m0.000s
sys 0m0.000s
``````output
/Users/wfh/code/lc/lckg/langchain/tools/shell/tool.py:34: UserWarning: The shell tool has no safeguards by default. Use at your own risk.
warnings.warn(
与智能体一起使用
与所有工具一样，这些工具可以提供给智能体以完成更复杂的任务。让我们让智能体从网页中获取一些链接。
from langgraph.prebuilt import create_react_agent
tools = [shell_tool]
agent = create_react_agent("openai:gpt-4.1-mini", tools)
input_message = {
"role": "user",
"content": (
"Download the README here and identify the link for LangChain tutorials: "
"https://raw.githubusercontent.com/langchain-ai/langchain/master/README.md"
),
}
for step in agent.stream(
{"messages": [input_message]},
stream_mode="values",
):
step["messages"][-1].pretty_print()
API 参考：create_react_agent
================================[1m Human Message [0m=================================
Download the README here and identify the link for LangChain tutorials: https://raw.githubusercontent.com/langchain-ai/langchain/master/README.md
==================================[1m Ai Message [0m==================================
Tool Calls:
terminal (call_mr86V0d6E9nQiJZT7Xw5fH0G)
Call ID: call_mr86V0d6E9nQiJZT7Xw5fH0G
Args:
commands: ['curl -o README.md https://raw.githubusercontent.com/langchain-ai/langchain/master/README.md']
Executing command:
['curl -o README.md https://raw.githubusercontent.com/langchain-ai/langchain/master/README.md']
=================================[1m Tool Message [0m=================================
Name: terminal
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 5169 100 5169 0 0 114k 0 --:--:-- --:--:-- --:--:-- 114k
``````output
/langchain/libs/community/langchain_community/tools/shell/tool.py:33: UserWarning: The shell tool has no safeguards by default. Use at your own risk.
warnings.warn(
``````output
==================================[1m Ai Message [0m==================================
Tool Calls:
terminal (call_LF8TGrgS84WvUvaazYnVfib8)
Call ID: call_LF8TGrgS84WvUvaazYnVfib8
Args:
commands: ["grep -i 'tutorial' README.md"]
Executing command:
["grep -i 'tutorial' README.md"]
=================================[1m Tool Message [0m=================================
Name: terminal
- [Tutorials](https://python.langchain.ac.cn/docs/tutorials/): Simple walkthroughs with
``````output
/langchain/libs/community/langchain_community/tools/shell/tool.py:33: UserWarning: The shell tool has no safeguards by default. Use at your own risk.
warnings.warn(
``````output
==================================[1m Ai Message [0m==================================
The link for LangChain tutorials in the README is: https://python.langchain.ac.cn/docs/tutorials/