# LangChainDeprecationWarning

> **Class** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/_api/deprecation/LangChainDeprecationWarning)

A class for issuing deprecation warnings for LangChain users.

## Signature

```python
LangChainDeprecationWarning()
```

## Extends

- `DeprecationWarning`

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/fddca066031a2122b3562485bd9c961a46978a1e/libs/core/langchain_core/_api/deprecation.py#L70)