chlog

CHANGELOG.md

@@ -240,6 +240,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Deprecated `.get_model()` with explicit `.lightning_module` property ([#6035](https://github.com/PyTorchLightning/pytorch-lightning/pull/6035))
 
 
+- Deprecated Trainer attribute `accelerator_backend` in favor of `accelerator` ([#6034](https://github.com/PyTorchLightning/pytorch-lightning/pull/6034))
+
+
+
 ### Removed
 
 - Removed deprecated checkpoint argument `filepath` ([#5321](https://github.com/PyTorchLightning/pytorch-lightning/pull/5321))

pytorch_lightning/trainer/deprecated_api.py

@@ -24,17 +24,8 @@ class DeprecatedDistDeviceAttributes:
     _device_type: DeviceType
     _running_stage: RunningStage
     num_gpus: int
-    accelerator: Accelerator
     accelerator_connector: AcceleratorConnector
 
-    @property
-    def accelerator_backend(self) -> Accelerator:
-        rank_zero_warn(
-            "The `Trainer.accelerator_backend` attribute is deprecated in favor of `Trainer.accelerator`"
-            " since 1.2 and will be removed in v1.4.", DeprecationWarning
-        )
-        return self.accelerator
-
     @property
     def on_cpu(self) -> bool:
         rank_zero_warn("Internal: `on_cpu` is deprecated in v1.2 and will be removed in v1.4.", DeprecationWarning)
@@ -143,10 +134,19 @@ def use_single_gpu(self, val: bool) -> None:
             self.accelerator_connector._device_type = DeviceType.GPU
 
 
-class DeprecatedModelAttributes:
+class DeprecatedTrainerAttributes:
 
+    accelerator: Accelerator
     lightning_module = LightningModule
 
+    @property
+    def accelerator_backend(self) -> Accelerator:
+        rank_zero_warn(
+            "The `Trainer.accelerator_backend` attribute is deprecated in favor of `Trainer.accelerator`"
+            " since 1.2 and will be removed in v1.4.", DeprecationWarning
+        )
+        return self.accelerator
+
     def get_model(self) -> LightningModule:
         rank_zero_warn(
             "The use of `Trainer.get_model()` is deprecated in favor of `Trainer.lightning_module`"

pytorch_lightning/trainer/trainer.py

@@ -45,7 +45,7 @@
 from pytorch_lightning.trainer.connectors.slurm_connector import SLURMConnector
 from pytorch_lightning.trainer.connectors.training_trick_connector import TrainingTricksConnector
 from pytorch_lightning.trainer.data_loading import TrainerDataLoadingMixin
-from pytorch_lightning.trainer.deprecated_api import DeprecatedDistDeviceAttributes, DeprecatedModelAttributes
+from pytorch_lightning.trainer.deprecated_api import DeprecatedDistDeviceAttributes, DeprecatedTrainerAttributes
 from pytorch_lightning.trainer.evaluation_loop import EvaluationLoop
 from pytorch_lightning.trainer.logging import TrainerLoggingMixin
 from pytorch_lightning.trainer.model_hooks import TrainerModelHooksMixin
@@ -80,7 +80,7 @@ class Trainer(
     TrainerTrainingTricksMixin,
     TrainerDataLoadingMixin,
     DeprecatedDistDeviceAttributes,
-    DeprecatedModelAttributes,
+    DeprecatedTrainerAttributes,
 ):
 
     @overwrite_by_env_vars