Depreciate get_observer (#214)

* depreciate get_observer

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

* use decorator, update docstring

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

---------

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

Author: kylesayrs

src/compressed_tensors/quantization/quant_args.py

@@ -18,6 +18,7 @@
 
 import torch
 from compressed_tensors.utils import Aliasable
+from compressed_tensors.utils.helpers import deprecated
 from pydantic import BaseModel, Field, field_validator, model_validator
 
 
@@ -123,12 +124,6 @@ class QuantizationArgs(BaseModel, use_enum_values=True):
         ),
     )
 
-    def get_observer(self):
-        """
-        :return: torch quantization FakeQuantize built based on these QuantizationArgs
-        """
-        return self.observer
-
     @field_validator("type", mode="before")
     def validate_type(cls, value) -> QuantizationType:
         if isinstance(value, str):
@@ -250,6 +245,10 @@ def pytorch_dtype(self) -> torch.dtype:
         else:
             raise ValueError(f"Invalid quantization type {self.type}")
 
+    @deprecated("QuantizationArgs.observer")
+    def get_observer(self) -> str:
+        return self.observer
+
 
 def round_to_quantized_type(
     tensor: torch.Tensor, args: QuantizationArgs

src/compressed_tensors/utils/helpers.py

@@ -170,8 +170,8 @@ def deprecated(future_name: Optional[str] = None, message: Optional[str] = None)
     """
     Decorator to mark functions as deprecated
 
-    :param new_function: Function called in place of depreciated function
-    :param message: Depreciation message, replaces default depreciation message
+    :param new_function: Function called in place of deprecated function
+    :param message: Deprecation message, replaces default deprecation message
     """
 
     def decorator(func: Callable[[Any], Any]):