This example shows how to retry a function call if it fails or you do not like the output. This is useful for:
- Handling temporary failures
- Improving output quality through retries
- Implementing human-in-the-loop validation
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)
Create a virtual environment
Open the Terminal and create a python virtual environment.
python3 -m venv .venv
source .venv/bin/activate
Run the agent
python retry_functions.py
