long-sleep-not-forever (ASYNC116)

Derived from the flake8-async linter.

Fix is sometimes available.

This rule is unstable and in preview. The --preview flag is required for use.

What it does

Checks for uses of trio.sleep() or anyio.sleep() with a delay greater than 24 hours.

Why is this bad?

Calling sleep() with a delay greater than 24 hours is usually intended to sleep indefinitely. Instead of using a large delay, trio.sleep_forever() or anyio.sleep_forever() better conveys the intent.

Example

import trio


async def func():
    await trio.sleep(86401)

Use instead:

import trio


async def func():
    await trio.sleep_forever()

Fix safety

This fix is marked as unsafe as it changes program behavior.