# BaseCumulativeTransformOutputParser

> **Class** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/output_parsers/transform/BaseCumulativeTransformOutputParser)

Base class for an output parser that can handle streaming input.

## Signature

```python
BaseCumulativeTransformOutputParser(
    self,
    *args: Any = (),
    **kwargs: Any = {},
)
```

## Extends

- `BaseTransformOutputParser[T]`

## Properties

- `diff`

---

[View source on GitHub](https://github.com/langchain-ai/langchain/blob/b302691ff9ad841804e93e5addbdc53b6974473b/libs/core/langchain_core/output_parsers/transform.py#L99)