Function calling
更新时间：2025-04-18
能力介绍
Function call是能将大模型与外部工具或代码相连的功能，可通过该功能增强大模型在实时性、数据计算等应用场景的推理效果或进行其他外部操作，包括信息检索、数据库操作、图谱搜索与处理等工具调用场景。
tools是模型服务API中的可选参数，用于向模型提供函数定义。通过此参数，模型能够生成符合用户所提供规范的函数参数。请注意，模型服务API实际上并不会执行任何函数调用，仅返回是否调用函数，以及调用的函数名与调用函数所需要的参数。开发者可以利用模型输出的参数在系统中进一步执行函数调用。
支持模型范围
- ernie-4.0-turbo-128k
- ernie-4.0-turbo-8k
- ernie-3.5-128k
- ernie-3.5-8k
- ernie-speed-pro-128k
- ernie-lite-pro-128k
- qwq-32b
- deepseek-v3
快速开始
调用步骤说明
- 使用JSON Schema格式定义函数；
- 通过tools参数将定义好的函数提交给支持function call的大模型，可一次提交多个函数；
- 大模型将根据当前聊天上下文，决定使用哪个函数，也可能不使用函数；
- 若大模型决定使用函数，大模型会将调用函数所需要的参数和信息通过JSON格式返回；
- 使用大模型输出的参数，执行对应的函数，并将此函数执行结果提交给大模型；
- 大模型将根据函数执行结果，给予用户回复。
SDK调用示例
from openai import OpenAI
client = OpenAI(
api_key=api_key ##
base_url="https://qianfan.baidubce.com/v2", ##
)
tools = [
{
"type": "function",
"function": {
"name": "get_current_weather",
"description": "Get the current weather in a given location",
"parameters": {
"type": "object",
"properties": {
"location": {
"type": "string",
"description": "The city and state, e.g. San Francisco, CA",
},
"unit": {"type": "string", "enum": ["celsius", "fahrenheit"]},
},
"required": ["location"],
},
}
}
]
messages = [{"role": "user", "content": "What's the weather like in Boston today?"}]
completion = client.chat.completions.create(
model="ernie-3.5-8k",
messages=messages,
tools=tools,
tool_choice="auto"
)
print(completion)典型案例
查询天气
请求示例
curl --location 'https://qianfan.baidubce.com/v2/chat/completions' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer bce-v3/ALTAK-IpGwCWpMaKK9kfz44OK2A/' \
--header 'Cookie: BAIDUID=6FC98A94EA43253A9B06FB79783DA833:FG=1' \
--data '{
"model": "ernie-lite-pro-128k",
"messages": [
{
"role": "user",
"content": "查一下上海和北京现在的天气"
}
],
"tools": [{
"type": "function",
"function": {
"name": "get_current_weather",
"description": "天气查询工具",
"parameters": {
"properties": {
"location": {
"description": "地理位置，精确到区县级别",
"type": "string"
},
"time": {
"description": "时间，格式为YYYY-MM-DD",
"type": "string"
}
},
"type": "object"
}
}
}],
"stream": false,
"stream_options": {
"include_usage": true
},
"tool_choice" : "auto",
"tool_options" : {"thoughts_output" : true}
}'返回示例
{
"id": "as-7jqstcp9ce",
"object": "chat.completion",
"created": 1732885634,
"model": "ernie-lite-pro-128k",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "",
"tool_calls": [
{
"id": "call_tmvd94n0t8",
"type": "function",
"function": {
"name": "get_current_weather",
"arguments": "{\"location\":\"上海\"}"
}
}
]
},
"finish_reason": "tool_calls",
"flag": 0
}
],
"usage": {
"prompt_tokens": 5,
"completion_tokens": 49,
"total_tokens": 54
}
}询问车票
请求示例
curl --location 'https://qianfan.baidubce.com/v2/chat/completions' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer bce-v3/ALTAK-IpGwCWpMaKK9kfz44OK2A/' \
--header 'Cookie: BAIDUID=6FC98A94EA43253A9B06FB79783DA833:FG=1' \
--data '{
"model": "ernie-3.5-8k",
"messages": [
{
"role": "system",
"content": "你是一个智能助手"
},
{
"role": "user",
"content": "你能帮我查询2024年1月1日从北京南站到上海的火车票吗？"
}
],
"stream": false,
"tools": [
{
"type": "function",
"function": {
"name": "query_train_info",
"description": "根据用户提供的信息，查询对应的车次",
"parameters": {
"type": "object",
"properties": {
"departure": {
"type": "string",
"description": "出发城市或车站"
},
"destination": {
"type": "string",
"description": "目的地城市或车站"
},
"date": {
"type": "string",
"description": "要查询的车次日期"
}
},
"required": [
"departure",
"destination",
"date"
]
}
}
}
]
}'返回示例
{
"id": "as-ubsiihj8d5",
"object": "chat.completion",
"created": 1732887366,
"model": "ernie-3.5-8k",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "",
"tool_calls": [
{
"id": "19d8e571660dd000",
"type": "function",
"function": {
"name": "query_train_info",
"arguments": "{\"departure\": \"北京南站\", \"destination\": \"上海\", \"date\": \"2024-01-01\"}"
}
}
]
},
"finish_reason": "tool_calls",
"flag": 0
}
],
"usage": {
"prompt_tokens": 19,
"completion_tokens": 33,
"total_tokens": 52
}
}