# with_optional_cache

> **Function** in `langsmith`

📖 [View in docs](https://reference.langchain.com/python/langsmith/utils/with_optional_cache)

Use a cache for requests.

## Signature

```python
with_optional_cache(
    path: Optional[Union[str, pathlib.Path]],
    ignore_hosts: Optional[Sequence[str]] = None,
    allow_hosts: Optional[Sequence[str]] = None,
) -> Generator[None, None, None]
```

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[View source on GitHub](https://github.com/langchain-ai/langsmith-sdk/blob/6a74bf5af9e542d8065af8edca54b2448f430916/python/langsmith/utils.py#L621)