Error messages for unsupported Trainer attributes

src/pytorch_lightning/core/module.py

@@ -269,6 +269,20 @@ def loggers(self) -> List[Logger]:
         """Reference to the list of loggers in the Trainer."""
         return self.trainer.loggers if self._trainer else []
 
+    @property
+    def use_amp(self) -> None:
+        raise AttributeError(
+            "`LightningModule.use_amp` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.amp_backend`.",
+        )
+
+    @use_amp.setter
+    def use_amp(self, use_amp: bool) -> None:
+        raise AttributeError(
+            "`LightningModule.use_amp` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.amp_backend`.",
+        )
+
     def _call_batch_hook(self, hook_name: str, *args: Any) -> Any:
         if self._trainer:
             datahook_selector = self._trainer._data_connector._datahook_selector

src/pytorch_lightning/trainer/trainer.py

@@ -2143,6 +2143,129 @@ def logged_metrics(self) -> _OUT_DICT:
     def progress_bar_metrics(self) -> _PBAR_DICT:
         return self._logger_connector.progress_bar_metrics
 
+    @property
+    def gpus(self) -> None:
+        raise AttributeError(
+            "`Trainer.gpus` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.num_devices` or `Trainer.device_ids` to get device information instead."
+        )
+
+    @property
+    def root_gpu(self) -> None:
+        raise AttributeError(
+            "`Trainer.root_gpu` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.strategy.root_device.index` instead."
+        )
+
+    @property
+    def tpu_cores(self) -> None:
+        raise AttributeError(
+            "`Trainer.tpu_cores` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.num_devices` instead."
+        )
+
+    @property
+    def ipus(self) -> None:
+        raise AttributeError(
+            "`Trainer.ipus` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.num_devices` instead."
+        )
+
+    @property
+    def num_gpus(self) -> None:
+        raise AttributeError(
+            "`Trainer.num_gpus` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.num_devices` instead."
+        )
+
+    @property
+    def devices(self) -> None:
+        raise AttributeError(
+            "`Trainer.devices` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.num_devices` or `Trainer.device_ids` to get device information instead."
+        )
+
+    @property
+    def use_amp(self) -> None:
+        raise AttributeError(
+            "`Trainer.use_amp` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.amp_backend`.",
+        )
+
+    @property
+    def weights_save_path(self) -> None:
+        raise AttributeError(
+            "`Trainer.weights_save_path` was deprecated in v1.6 and is no longer accessible as of v1.8."
+        )
+
+    @property
+    def lightning_optimizers(self) -> None:
+        raise AttributeError(
+            "`Trainer.lightning_optimizers` was deprecated in v1.6 and is no longer accessible as of v1.8."
+        )
+
+    @property
+    def should_rank_save_checkpoint(self) -> None:
+        raise AttributeError(
+            "`Trainer.should_rank_save_checkpoint` was deprecated in v1.6 and is no longer accessible as of v1.8.",
+        )
+
+    @property
+    def validated_ckpt_path(self) -> None:
+        raise AttributeError(
+            "The `Trainer.validated_ckpt_path` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.ckpt_path` instead."
+        )
+
+    @validated_ckpt_path.setter
+    def validated_ckpt_path(self, ckpt_path: Optional[str]) -> None:
+        raise AttributeError(
+            "The `Trainer.validated_ckpt_path` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.ckpt_path` instead."
+        )
+
+    @property
+    def tested_ckpt_path(self) -> None:
+        raise AttributeError(
+            "The `Trainer.tested_ckpt_path` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.ckpt_path` instead."
+        )
+
+    @tested_ckpt_path.setter
+    def tested_ckpt_path(self, ckpt_path: Optional[str]) -> None:
+        raise AttributeError(
+            "The `Trainer.tested_ckpt_path` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.ckpt_path` instead."
+        )
+
+    @property
+    def predicted_ckpt_path(self) -> None:
+        raise AttributeError(
+            "The `Trainer.predicted_ckpt_path` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.ckpt_path` instead."
+        )
+
+    @predicted_ckpt_path.setter
+    def predicted_ckpt_path(self, ckpt_path: Optional[str]) -> None:
+        raise AttributeError(
+            "The `Trainer.predicted_ckpt_path` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `Trainer.ckpt_path` instead."
+        )
+
+    @property
+    def verbose_evaluate(self) -> None:
+        raise AttributeError(
+            "The `Trainer.verbose_evaluate` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `trainer.{validate,test}_loop.verbose` instead.",
+        )
+
+    @verbose_evaluate.setter
+    def verbose_evaluate(self, verbose: bool) -> None:
+        raise AttributeError(
+            "The `Trainer.verbose_evaluate` was deprecated in v1.6 and is no longer accessible as of v1.8."
+            " Please use `trainer.{validate,test}_loop.verbose` instead.",
+        )
+
     @property
     def _results(self) -> Optional[_ResultCollection]:
         active_loop = self._active_loop

tests/tests_pytorch/deprecated_api/test_remove_2-0.py

@@ -300,3 +300,62 @@ def test_v2_0_0_deprecated_mc_save_checkpoint():
         match=r"ModelCheckpoint.save_checkpoint\(\)` was deprecated in v1.6 and is no longer supported as of 1.8.",
     ):
         mc.save_checkpoint(trainer)
+
+
+@pytest.mark.parametrize(
+    "attribute",
+    [
+        "gpus",
+        "num_gpus",
+        "root_gpu",
+        "devices",
+        "tpu_cores",
+        "ipus",
+        "use_amp",
+        "weights_save_path",
+        "lightning_optimizers",
+        "should_rank_save_checkpoint",
+        "validated_ckpt_path",
+        "tested_ckpt_path",
+        "predicted_ckpt_path",
+        "verbose_evaluate",
+    ],
+)
+def test_v2_0_0_trainer_unsupported_getters(attribute):
+    trainer = Trainer()
+    with pytest.raises(
+        AttributeError, match=f"`Trainer.{attribute}` was deprecated in v1.6 and is no longer accessible as of v1.8."
+    ):
+        getattr(trainer, attribute)
+
+
+@pytest.mark.parametrize(
+    "attribute",
+    [
+        "validated_ckpt_path",
+        "tested_ckpt_path",
+        "predicted_ckpt_path",
+        "verbose_evaluate",
+    ],
+)
+def test_v2_0_0_trainer_unsupported_setters(attribute):
+    trainer = Trainer()
+    with pytest.raises(
+        AttributeError, match=f"`Trainer.{attribute}` was deprecated in v1.6 and is no longer accessible as of v1.8."
+    ):
+        setattr(trainer, attribute, None)
+
+
+def test_v2_0_0_lightning_module_unsupported_use_amp():
+    model = BoringModel()
+    with pytest.raises(
+        AttributeError,
+        match="`LightningModule.use_amp` was deprecated in v1.6 and is no longer accessible as of v1.8.",
+    ):
+        _ = model.use_amp
+
+    with pytest.raises(
+        AttributeError,
+        match="`LightningModule.use_amp` was deprecated in v1.6 and is no longer accessible as of v1.8.",
+    ):
+        model.use_amp = False