掌握大语言模型提示词工程：利用工具实现自动推理的高效教程！

Function/Tool Calling

@openai: 函数调用为 OpenAI 模型提供了一种强大而灵活的方式，可以与您的代码或外部服务进行交互。通过函数调用，您可以向 Assistant 描述函数，并让其智能地返回需要调用的函数及其参数。@openai

@langchain: 我们将“工具调用”与“函数调用”互换使用。虽然“函数调用”有时指的是单个函数的调用，但我们将所有模型视为可以在每条消息中返回多个工具或函数调用。

工具调用与 ReACT 的区别

function calling 核心概念

• tools: 函数列表
• function: 单个函数定义
• function.name: 函数名字
• function.description: 函数作用描述
• parameters: 函数形参说明

"tools": [ { "type": "function", "function": { "name": "current_time", "description": "A tool for getting the current time.", "parameters": { "properties": {}, "required": [], "type": "object" } } }, { "type": "function", "function": { "name": "simple_code", "description": "A tool for running code and getting the result back. Only native packages are allowed, network/IO operations are disabled. and you must use print() or console.log() to output the result or result will be empty.", "parameters": { "properties": { "code": { "description": "code to be executed, only native packages are allowed, network/IO operations are disabled.", "type": "string" }, "language": { "description": "language of the code, only \"python3\" and \"javascript\" are supported", "type": "string" } }, "required": ["language", "code"], "type": "object" } } }]

工具调用的返回格式

• tool_calls: 工具调用序列，单个或者多个
• function 函数调用
• function.name 函数名字
• function.arguments 函数实参

"message": { "role": "assistant", "content": "", "tool_calls": [ { "function": { "name": "simple_code", "arguments": { "code": "print(0.9111 ** 3)", "language": "python3" } } } ] }

常用工具

• 代码解析器 python node
• 命令解析器 bash
• 文件管理 file directory
• 浏览器控制 browser use
• 外部接口 openapi swagger
• 大模型上下文协议 MCP playwright-mcp

python 工具调用示例

没有工具调用的对话模型

使用工具可以获得更加准确的结果

带有 function call 的请求

{ "model": "qwen3","stream": false,"options": { "temperature": 0 },"messages": [ { "role": "system", "content": "/no_think\n" }, { "role": "user", "content": "使用python计算 0.9111**3=" } ],"tools": [ { "type": "function", "function": { "name": "current_time", "description": "A tool for getting the current time.", "parameters": { "properties": {}, "required": [], "type": "object" } } }, { "type": "function", "function": { "name": "simple_code", "description": "A tool for running code and getting the result back. Only native packages are allowed, network/IO operations are disabled. and you must use print() or console.log() to output the result or result will be empty.", "parameters": { "properties": { "code": { "description": "code to be executed, only native packages are allowed, network/IO operations are disabled.", "type": "string" }, "language": { "description": "language of the code, only \"python3\" and \"javascript\" are supported", "type": "string" } }, "required": ["language", "code"], "type": "object" } } } ]}

大模型的响应

{ "model": "qwen3","created_at": "2025-05-05T16:57:36.016688Z","message": { "role": "assistant", "content": "", "tool_calls": [ { "function": { "name": "simple_code", "arguments": { "code": "print(0.9111 ** 3)", "language": "python3" } } } ] },"done_reason": "stop","done": true,"total_duration": 2037533417,"load_duration": 34440000,"prompt_eval_count": 275,"prompt_eval_duration": 776227166,"eval_count": 42,"eval_duration": 1225024292}

最终请求

{ "model": "qwen3","stream": false,"options": { "temperature": 0 },"messages": [ { "role": "system", "content": "/no_think\n" }, { "role": "user", "content": "使用python计算 0.9111**3=" }, { "role": "assistant", "content": "" }, { "role": "tool", "content": "0.756307034631\n" } ],"tools": [ { "type": "function", "function": { "name": "current_time", "description": "A tool for getting the current time.", "parameters": { "properties": {}, "required": [], "type": "object" } } }, { "type": "function", "function": { "name": "simple_code", "description": "A tool for running code and getting the result back. Only native packages are allowed, network/IO operations are disabled. and you must use print() or console.log() to output the result or result will be empty.", "parameters": { "properties": { "code": { "description": "code to be executed, only native packages are allowed, network/IO operations are disabled.", "type": "string" }, "language": { "description": "language of the code, only \"python3\" and \"javascript\" are supported", "type": "string" } }, "required": ["language", "code"], "type": "object" } } } ]}

最终响应

{ "model": "qwen3","created_at": "2025-05-05T16:57:37.121945Z","message": { "role": "assistant", "content": "<think>\n\n</think>\n\n0.9111 raised to the power of 3 is approximately **0.7563**." },"done_reason": "stop","done": true,"total_duration": 1030672292,"load_duration": 11999667,"prompt_eval_count": 303,"prompt_eval_duration": 122764292,"eval_count": 29,"eval_duration": 892274041}

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