From 5947b39f54fa746e62222524e572153369883248 Mon Sep 17 00:00:00 2001
From: Jirka Borovec <jirka.borovec@seznam.cz>
Date: Thu, 18 Feb 2021 14:53:09 +0100
Subject: [PATCH] ...

---
 pytorch_lightning/trainer/deprecated_api.py | 3 +++
 pytorch_lightning/trainer/trainer.py        | 3 ++-
 pytorch_lightning/utilities/data.py         | 4 +---
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/pytorch_lightning/trainer/deprecated_api.py b/pytorch_lightning/trainer/deprecated_api.py
index 8e2e90dda8a7c..ddd54961c558c 100644
--- a/pytorch_lightning/trainer/deprecated_api.py
+++ b/pytorch_lightning/trainer/deprecated_api.py
@@ -133,6 +133,9 @@ def use_single_gpu(self, val: bool) -> None:
         if val:
             self.accelerator_connector._device_type = DeviceType.GPU
 
+
+class DeprecatedModelAttributes:
+
     def get_model(self) -> LightningModule:
         rank_zero_warn(
             "The use of `Trainer.get_model()` is deprecated in favor of `Trainer.lightning_module`"
diff --git a/pytorch_lightning/trainer/trainer.py b/pytorch_lightning/trainer/trainer.py
index e0bc6d51dbb2b..7ad61020ab099 100644
--- a/pytorch_lightning/trainer/trainer.py
+++ b/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
+from pytorch_lightning.trainer.deprecated_api import DeprecatedDistDeviceAttributes, DeprecatedModelAttributes
 from pytorch_lightning.trainer.evaluation_loop import EvaluationLoop
 from pytorch_lightning.trainer.logging import TrainerLoggingMixin
 from pytorch_lightning.trainer.model_hooks import TrainerModelHooksMixin
@@ -80,6 +80,7 @@ class Trainer(
     TrainerTrainingTricksMixin,
     TrainerDataLoadingMixin,
     DeprecatedDistDeviceAttributes,
+    DeprecatedModelAttributes,
 ):
 
     @overwrite_by_env_vars
diff --git a/pytorch_lightning/utilities/data.py b/pytorch_lightning/utilities/data.py
index 6b887b8526f90..a73299e2af77b 100644
--- a/pytorch_lightning/utilities/data.py
+++ b/pytorch_lightning/utilities/data.py
@@ -30,9 +30,7 @@ def has_len(dataloader: DataLoader) -> bool:
     try:
         # try getting the length
         if len(dataloader) == 0:
-            raise ValueError(
-                '`Dataloader` returned 0 length. Please make sure that it returns at least 1 batch'
-            )
+            raise ValueError('`Dataloader` returned 0 length. Please make sure that it returns at least 1 batch')
         has_len = True
     except TypeError:
         has_len = False