本示例展示了如何在函数调用失败或您不满意其输出时重试该函数调用。这对于以下场景非常有用：
  • 处理临时故障
  • 通过重试提高输出质量
  • 实现人工干预验证

​
代码

retry_functions.py
from typing import Iterator

from agno.agent import Agent
from agno.exceptions import RetryAgentRun
from agno.tools import FunctionCall, tool

num_calls = 0


def pre_hook(fc: FunctionCall):
    global num_calls

    print(f"Pre-hook: {fc.function.name}")
    print(f"Arguments: {fc.arguments}")
    num_calls += 1
    if num_calls < 2:
        raise RetryAgentRun(
            "This wasn't interesting enough, please retry with a different argument"
        )


@tool(pre_hook=pre_hook)
def print_something(something: str) -> Iterator[str]:
    print(something)
    yield f"I have printed {something}"


agent = Agent(tools=[print_something], markdown=True)
agent.print_response("Print something interesting", stream=True)

​
使用方法

1

创建虚拟环境

打开 Terminal 并创建一个 python 虚拟环境。
python3 -m venv .venv
source .venv/bin/activate
2

安装库文件

pip install openai agno
3

运行代理

python retry_functions.py