sniffio

1.3.1 · active · verified Sat Mar 28

A Python library that detects which asynchronous I/O library (e.g., Trio, asyncio) is currently running in your code. Current version: 1.3.1, released on February 25, 2024. Maintained by the Trio project, it has a stable release cadence with updates approximately every 1-2 years.

Warnings

breaking Dropped support for Python 3.5 and 3.6 in version 1.3.0
Fix: Upgrade to Python 3.7 or later.
deprecated Explicit version specifications in USES=python for '3.x+' are deprecated
Fix: Remove explicit version specifications in USES=python.

Install

pip install sniffio Install sniffio

Imports

current_async_library
```
from sniffio import current_async_library
```
Ensure correct import path to access the function.

Quickstart

A simple script demonstrating how to use sniffio to detect the current async library and run a coroutine accordingly.

import sniffio
import trio
import asyncio

async def print_library():
    library = sniffio.current_async_library()
    print(f'This is {library}')

# Prints 'This is trio'
trio.run(print_library)

# Prints 'This is asyncio'
asyncio.run(print_library())

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