# APIFuture

## _class_ [**tinker.APIFuture**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/lib/public_interfaces/api_future.py#L15)(...)

Abstract base class for futures that can be awaited or accessed synchronously.

APIFuture provides a unified interface for handling async operations that can
be accessed both synchronously (via result()) and asynchronously (via await or result_async()).
This allows for flexible usage patterns in both sync and async contexts.

The future can be awaited directly in async contexts:

```
result = await api_future  # Equivalent to await api_future.result_async()
```

**Or accessed synchronously:**

```
result = api_future.result()  # Blocks until complete
```

```
# In async context
future = training_client.forward_backward(data, "cross_entropy")
result = await future  # Or await future.result_async()

# In sync context
future = training_client.forward_backward(data, "cross_entropy")
result = future.result()
```

### [**result**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/lib/public_interfaces/api_future.py#L63)( _timeout=None_)

Get the result synchronously with optional timeout.

**Parameters:**

- [**timeout**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/lib/public_interfaces/api_future.py#L63) ( _float | None_, default: `None`) – Maximum time to wait in seconds. None means wait indefinitely.

**Returns:** The result value of type [`T`](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/_utils/_proxy.py#L8)

_Async variant:_`result_async()`

## Referenced by

- [RestClient.get_sampler](https://tinker-docs.thinkingmachines.ai/tinker/api-reference/restclient/#get_sampler)
- [RestClient.get_weights_info_by_tinker_path](https://tinker-docs.thinkingmachines.ai/tinker/api-reference/restclient/#get_weights_info_by_tinker_path)
- [TrainingClient.forward](https://tinker-docs.thinkingmachines.ai/tinker/api-reference/trainingclient/#forward)
- [TrainingClient.forward_backward](https://tinker-docs.thinkingmachines.ai/tinker/api-reference/trainingclient/#forward_backward)
- [TrainingClient.forward_backward_custom](https://tinker-docs.thinking-machines.ai/tinker/api-reference/trainingclient/#forward_backward_custom)
- [TrainingClient.load_state](https://tinker-docs.thinkingmachines.ai/tinker/api-reference/trainingclient/#load_state)
- [TrainingClient.load_state_with_optimizer](https://tinker-docs.thinkingmachines.ai/tinker/api-reference/trainingclient/#load_state_with_optimizer)
- [TrainingClient.optim_step](https://tinker-docs.thinking-machines.ai/tinker/api-reference/trainingclient/#optim_step)
- [TrainingClient.save_state](https://tinker-docs.thinking-machines-ai/tinker/api-reference/trainingclient/#save_state)
- [TrainingClient.save_weights_for_sampler](https://tinker-docs.thinking-machines.ai/tinker/api-reference/trainingclient/#save_weights_for_sampler)