Async is a concurrent programming design that has been supported since Python 3.4 to learn more about async in python refer to Real Python’s Async walkthrough.

Strawberry supports both async and non async resolvers, so can mix and match them in your code. Here’s an example of async resolver:

import asyncio
import strawberry

async def resolve_hello(root) -> str:
    await asyncio.sleep(1)

    return "Hello world"

class Query:
    hello: str = strawberry.field(resolver=resolve_hello)

schema = strawberry.Schema(Query)
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