Error messages for removed Logger APIs

src/pytorch_lightning/_graveyard/__init__.py

@@ -13,5 +13,6 @@
 # limitations under the License.
 
 import pytorch_lightning._graveyard.callbacks
+import pytorch_lightning._graveyard.loggers
 import pytorch_lightning._graveyard.trainer
 import pytorch_lightning._graveyard.training_type  # noqa: F401

src/pytorch_lightning/_graveyard/loggers.py

@@ -0,0 +1,50 @@
+# Copyright The PyTorch Lightning team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from typing import Any
+
+import pytorch_lightning as pl
+from pytorch_lightning.loggers import Logger
+
+
+class LoggerCollection:
+    # TODO: Remove in v2.0.0
+    def __init__(self, _: Any):
+        raise RuntimeError(
+            "`LoggerCollection` was deprecated in v1.6 and removed in v1.8. Directly pass a list of loggers"
+            " to the `Trainer` and access the list via the `trainer.loggers` attribute."
+        )
+
+
+def _update_agg_funcs(logger: Logger, *__: Any, **___: Any) -> None:
+    # TODO: Remove in v2.0.0
+    raise NotImplementedError(
+        f"`{type(logger).__name__}.update_agg_funcs` was deprecated in v1.6 and is no longer supported as of v1.8."
+    )
+
+
+def _agg_and_log_metrics(logger: Logger, *__: Any, **___: Any) -> None:
+    # TODO: Remove in v2.0.0
+    raise NotImplementedError(
+        f"`{type(logger).__name__}.update_agg_funcs` was deprecated in v1.6 and is no longer supported as of v1.8."
+    )
+
+
+# Methods
+Logger.update_agg_funcs = _update_agg_funcs
+Logger.agg_and_log_metrics = _agg_and_log_metrics
+
+# Classes
+pl.loggers.logger.LoggerCollection = LoggerCollection
+pl.loggers.base.LoggerCollection = LoggerCollection

src/pytorch_lightning/trainer/configuration_validator.py

@@ -16,6 +16,7 @@
 import pytorch_lightning as pl
 from lightning_lite.utilities.warnings import PossibleUserWarning
 from pytorch_lightning.accelerators.ipu import IPUAccelerator
+from pytorch_lightning.loggers import Logger
 from pytorch_lightning.strategies import DataParallelStrategy
 from pytorch_lightning.trainer.states import TrainerFn
 from pytorch_lightning.utilities.exceptions import MisconfigurationException
@@ -54,6 +55,8 @@ def verify_loop_configurations(trainer: "pl.Trainer") -> None:
     _check_on_epoch_start_end(model)
     # TODO: Delete this check in v2.0
     _check_on_pretrain_routine(model)
+    # TODO: Delete this check in v2.0
+    _check_deprecated_logger_methods(trainer)
 
 
 def __verify_train_val_loop_configuration(trainer: "pl.Trainer", model: "pl.LightningModule") -> None:
@@ -261,3 +264,17 @@ def _check_deprecated_callback_hooks(trainer: "pl.Trainer") -> None:
                 raise RuntimeError(
                     f"The `Callback.{hook}` hook was removed in v1.8. Please use `Callback.on_fit_start` instead."
                 )
+
+
+def _check_deprecated_logger_methods(trainer: "pl.Trainer") -> None:
+    for logger in trainer.loggers:
+        if is_overridden(method_name="update_agg_funcs", instance=logger, parent=Logger):
+            raise RuntimeError(
+                f"`{type(logger).__name__}.update_agg_funcs` was deprecated in v1.6 and is no longer supported as of"
+                " v1.8."
+            )
+        if is_overridden(method_name="agg_and_log_metrics", instance=logger, parent=Logger):
+            raise RuntimeError(
+                f"`{type(logger).__name__}.agg_and_log_metrics` was deprecated in v1.6 and is no longer supported as of"
+                " v1.8."
+            )

tests/tests_pytorch/graveyard/test_loggers.py

@@ -0,0 +1,64 @@
+# Copyright The PyTorch Lightning team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import pytest
+
+from pytorch_lightning import Trainer
+from pytorch_lightning.demos.boring_classes import BoringModel
+from pytorch_lightning.loggers import CSVLogger
+
+
+def test_v2_0_0_unsupported_agg_and_log_metrics(tmpdir):
+    class AggAndLogMetricsLogger(CSVLogger):
+        def agg_and_log_metrics(self, metrics, step):
+            pass
+
+    model = BoringModel()
+    logger = AggAndLogMetricsLogger(tmpdir)
+
+    trainer = Trainer(logger=logger)
+
+    with pytest.raises(
+        RuntimeError,
+        match="`AggAndLogMetricsLogger.agg_and_log_metrics` was deprecated in v1.6 and is no longer supported",
+    ):
+        trainer.fit(model)
+
+
+def test_v2_0_0_unsupported_update_agg_funcs(tmpdir):
+    class UpdateAggFuncsLogger(CSVLogger):
+        def update_agg_funcs(self, metrics, step):
+            pass
+
+    model = BoringModel()
+    logger = UpdateAggFuncsLogger(tmpdir)
+
+    trainer = Trainer(logger=logger)
+
+    with pytest.raises(
+        RuntimeError,
+        match="`UpdateAggFuncsLogger.update_agg_funcs` was deprecated in v1.6 and is no longer supported",
+    ):
+        trainer.fit(model)
+
+
+def test_v2_0_0_unsupported_logger_collection_class():
+    from pytorch_lightning.loggers.base import LoggerCollection
+
+    with pytest.raises(RuntimeError, match="`LoggerCollection` was deprecated in v1.6 and removed in v1.8."):
+        LoggerCollection(None)
+
+    from pytorch_lightning.loggers.logger import LoggerCollection
+
+    with pytest.raises(RuntimeError, match="`LoggerCollection` was deprecated in v1.6 and removed in v1.8."):
+        LoggerCollection(None)