[Hotfix] Implement method on dense compressor (#345)

* swap to dense

Signed-off-by: Kyle Sayers <kylesayrs@gmail.com>

* update docstring

Signed-off-by: Kyle Sayers <kylesayrs@gmail.com>

---------

Signed-off-by: Kyle Sayers <kylesayrs@gmail.com>

Author: kylesayrs

src/compressed_tensors/compressors/sparse_compressors/base.py

@@ -13,9 +13,8 @@
 # limitations under the License.
 
 import logging
-from typing import TYPE_CHECKING, Dict, Generator, Optional, Set, Tuple
+from typing import Dict, Generator, Optional, Set, Tuple
 
-import torch
 from compressed_tensors.compressors.base import BaseCompressor
 from compressed_tensors.utils import (
     get_nested_mappings_from_state_dict,
@@ -27,10 +26,6 @@
 from tqdm import tqdm
 
 
-if TYPE_CHECKING:
-    from compressed_tensors.quantization import QuantizationScheme
-
-
 __all__ = ["BaseSparseCompressor"]
 
 _LOGGER: logging.Logger = logging.getLogger(__name__)
@@ -205,16 +200,3 @@ def should_compress(name: str, expanded_targets: Optional[Set[str]] = None) -> b
         return (
             name.endswith(".weight") and name[: -(len(".weight"))] in expanded_targets
         )
-
-    def decompress_module_from_state_dict(
-        self,
-        prefix: str,
-        state_dict: Dict[str, torch.Tensor],
-        scheme: "QuantizationScheme",
-    ) -> Dict[str, torch.Tensor]:
-        """
-        This function is implemented as a workaround because of how
-        `ModelCompressor.quantization_compressor` can be set to either
-        an instance of `BaseQuantizationCompressor` or `BaseSparseCompressor`.
-        """
-        return state_dict.copy()

src/compressed_tensors/compressors/sparse_compressors/dense.py

@@ -12,13 +12,18 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import Dict, Generator, Tuple
+from typing import TYPE_CHECKING, Dict, Generator, Tuple
 
+import torch
 from compressed_tensors.compressors.base import BaseCompressor
 from compressed_tensors.config import CompressionFormat
 from torch import Tensor
 
 
+if TYPE_CHECKING:
+    from compressed_tensors.quantization import QuantizationScheme
+
+
 @BaseCompressor.register(name=CompressionFormat.dense.value)
 class DenseCompressor(BaseCompressor):
     """
@@ -47,3 +52,16 @@ def decompress_from_state_dict(
     ) -> Generator[Tuple[str, Dict[str, Tensor]], None, None]:
         for key, value in state_dict.items():
             yield key, value
+
+    def decompress_module_from_state_dict(
+        self,
+        prefix: str,
+        state_dict: Dict[str, torch.Tensor],
+        scheme: "QuantizationScheme",
+    ) -> Dict[str, torch.Tensor]:
+        """
+        This function is implemented as a workaround because of how
+        `ModelCompressor.quantization_compressor` can be set to either
+        an instance of `BaseQuantizationCompressor` or `DenseCompressor`.
+        """
+        return state_dict.copy()