# merge_chat_generation_chunks

> **Function** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/outputs/chat_generation/merge_chat_generation_chunks)

Merge a list of `ChatGenerationChunk`s into a single `ChatGenerationChunk`.

## Signature

```python
merge_chat_generation_chunks(
    chunks: list[ChatGenerationChunk],
) -> ChatGenerationChunk | None
```

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| `chunks` | `list[ChatGenerationChunk]` | Yes | A list of `ChatGenerationChunk` to merge. |

## Returns

`ChatGenerationChunk | None`

A merged `ChatGenerationChunk`, or `None` if the input list is empty.

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/9f232caa7a8fe1ca042a401942d5d90d54ceb1a6/libs/core/langchain_core/outputs/chat_generation.py#L140)