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# nemo_automodel.components.checkpoint.state_dict_adapter

## Module Contents

### Classes

| Name                                                                                            | Description                                         |
| ----------------------------------------------------------------------------------------------- | --------------------------------------------------- |
| [`StateDictAdapter`](#nemo_automodel-components-checkpoint-state_dict_adapter-StateDictAdapter) | Abstract base class for state dict transformations. |

### API

```python
class nemo_automodel.components.checkpoint.state_dict_adapter.StateDictAdapter()
```

Abstract

Abstract base class for state dict transformations.

This class defines the interface for converting between native model
state dict format and other model state dict formats.

```python
nemo_automodel.components.checkpoint.state_dict_adapter.StateDictAdapter.convert_single_tensor_to_hf(
    fqn: str,
    tensor: typing.Any,
    kwargs = {}
) -> list[tuple[str, typing.Any]]
```

abstract

Convert a single tensor from native format to HuggingFace format.

**Parameters:**

Fully qualified name of the tensor in native format

The tensor to convert

Additional arguments for conversion

**Returns:** `list[tuple[str, Any]]`

List of (fqn, tensor) tuples in HuggingFace format.

```python
nemo_automodel.components.checkpoint.state_dict_adapter.StateDictAdapter.from_hf(
    hf_state_dict: dict[str, typing.Any],
    device_mesh: typing.Optional[torch.distributed.device_mesh.DeviceMesh] = None,
    kwargs = {}
) -> dict[str, typing.Any]
```

abstract

Obtain native model state dict from HuggingFace format.

**Parameters:**

The HuggingFace format state dict

Optional device mesh for DTensor expert parallelism.
If provided, only loads experts needed for the current rank.

**Returns:** `dict[str, Any]`

The converted native model state dict

```python
nemo_automodel.components.checkpoint.state_dict_adapter.StateDictAdapter.to_hf(
    state_dict: dict[str, typing.Any],
    kwargs = {}
) -> dict[str, typing.Any]
```

abstract

Convert from native model state dict to HuggingFace format.

**Parameters:**

The native model state dict

**Returns:** `dict[str, Any]`

The converted HuggingFace format state dict