# build_range_header

> **Function** in `langsmith`

📖 [View in docs](https://reference.langchain.com/python/langsmith/sandbox/_helpers/build_range_header)

Render a byte range as an RFC 9110 ``Range`` header value.

## Signature

```python
build_range_header(
    *,
    start: Optional[int],
    end: Optional[int],
    suffix_bytes: Optional[int],
) -> str
```

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[View source on GitHub](https://github.com/langchain-ai/langsmith-sdk/blob/a39745c67839496a98e5e846122664d8070c8dca/python/langsmith/sandbox/_helpers.py#L89)