nfo

Async Usage

Demonstrates transparent async support — @log_call and @catch automatically detect async def functions.

What it shows

• Async @log_call — works with async def without a separate decorator
• Async @catch — suppresses exceptions in async functions
• asyncio.gather — concurrent execution, all calls logged

Run

pip install nfo
python examples/async-usage/main.py

Key code

from nfo import log_call, catch

@log_call
async def fetch_data(url: str) -> dict:
    await asyncio.sleep(0.05)
    return {"url": url, "status": 200}

@catch(default={})
async def risky_fetch(url: str) -> dict:
    if "bad" in url:
        raise ConnectionError(f"Cannot connect to {url}")
    return {"url": url, "data": "ok"}

No special async decorator needed — nfo detects async def via inspect.iscoroutinefunction().

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