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---
title: Async
---
# Async
Async is a concurrent programming design that has been supported in Python since
version 3.4. To learn more about async in Python refer to
[Real Python’s Async walkthrough](https://realpython.com/async-io-python/).
Strawberry supports both async and non async resolvers, so you can mix and match
them in your code. Here’s an example of an async resolver:
```python
import asyncio
import strawberry
async def resolve_hello(root) -> str:
await asyncio.sleep(1)
return "Hello world"
@strawberry.type
class Query:
hello: str = strawberry.field(resolver=resolve_hello)
schema = strawberry.Schema(Query)
```
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