> ## 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.

# Get Default • Rust AI Agent SDK

> get_default: Get a specific default value Supports nested keys like 'memory.backend'

# get\_default

<div className="flex items-center gap-2">
  <Badge color="teal">Function</Badge>
</div>

> This function is defined in the [**config\_loader**](../modules/config_loader) module.

Get a specific default value Supports nested keys like "memory.backend"

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def get_default(key: &str, fallback: T) -> T
```

## Parameters

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

<ParamField query="fallback" type="T" required={true}>
  No description available.
</ParamField>

### Returns

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

## Uses

* `get_defaults_config`
* `to_value`
* `unwrap_or_default`
* `split`
* `get`
* `from_value`
* `unwrap_or`

## Source

<Card title="View on GitHub" icon="github" href="https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-rust/praisonai/src/parity/config_loader.rs#L293">
  `praisonai/src/parity/config_loader.rs` at line 293
</Card>