# openapi_dumps

> **Function** in `langsmith`

📖 [View in docs](https://reference.langchain.com/python/langsmith/_openapi_client/_utils/_json/openapi_dumps)

Serialize an object to UTF-8 encoded JSON bytes.

Extends the standard json.dumps with support for additional types
commonly used in the SDK, such as `datetime`, `pydantic.BaseModel`, etc.

## Signature

```python
openapi_dumps(
    obj: Any,
) -> bytes
```

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[View source on GitHub](https://github.com/langchain-ai/langsmith-sdk/blob/d6cd6082f09e7826a2d6afe444ae6119e61b82a6/python/langsmith/_openapi_client/_utils/_json.py#L11)