# is_async_generator

> **Function** in `langgraph`

📖 [View in docs](https://reference.langchain.com/python/langgraph/_internal/_runnable/is_async_generator)

Check if a function is an async generator.

## Signature

```python
is_async_generator(
    func: Any,
) -> TypeGuard[Callable[..., AsyncIterator]]
```

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[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/1142ebf9213e3eb01b9d1e7223b9f6b30bf8da61/libs/langgraph/langgraph/_internal/_runnable.py#L490)