Background tasks

It is often desirable and very convenient to make usage of tasks (opens new window) in async Python. Sanic provides a convenient method to add tasks to the currently running loop. It is somewhat similar to asyncio.create_task.

async def notify_server_started_after_five_seconds():
    await asyncio.sleep(5)
    print('Server successfully started!')

app.add_task(notify_server_started_after_five_seconds())

Sanic will attempt to automatically inject the app, passing it as an argument to the task.

async def auto_inject(app):
    await asyncio.sleep(5)
    print(app.name)

app.add_task(auto_inject)

Or you can pass the app argument explicitly.

async def explicit_inject(app):
    await asyncio.sleep(5)
    print(app.name)

app.add_task(explicit_inject(app))