await-outside-async (PLE1142)

Derived from the Pylint linter.

What it does

Checks for uses of await outside async functions.

Why is this bad?

Using await outside an async function is a syntax error.

Example

import asyncio


def foo():
    await asyncio.sleep(1)

Use instead:

import asyncio


async def foo():
    await asyncio.sleep(1)

Notebook behavior

As an exception, await is allowed at the top level of a Jupyter notebook (see: autoawait).

References

• Python documentation: Await expression
• PEP 492: Await Expression