> ## Documentation Index
> Fetch the complete documentation index at: https://praison.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Update From Event • Rust AI Agent SDK

> update_from_event: Update metrics from a stream event

# update\_from\_event

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  <Badge color="purple">Method</Badge>
</div>

> This is a method of the [**StreamMetrics**](../classes/StreamMetrics) class in the [**streaming**](../modules/streaming) module.

Update metrics from a stream event

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def update_from_event(&mut self, event: &StreamEvent) -> ()
```

## Parameters

<ParamField query="event" type="&StreamEvent" required={true}>
  No description available.
</ParamField>

### Returns

<ResponseField name="Returns" type="()">
  The result of the operation.
</ResponseField>