Remove the deprecated agg_and_log_metrics

src/pytorch_lightning/CHANGELOG.md

@@ -203,6 +203,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Removed the deprecated device attributes `Trainer.{devices,gpus,num_gpus,ipus,tpu_cores}` in favor of the accelerator-agnostic `Trainer.num_devices` ([#14829](https://github.com/Lightning-AI/lightning/pull/14829))
 
 
+- Removed the deprecated `Logger.agg_and_log_metrics` hook in favour of `Logger.log_metrics` and the `agg_key_funcs` and `agg_default_func` arguments. ([#14840](https://github.com/Lightning-AI/lightning/pull/14840))
+
+
 - Removed the deprecated precision plugin checkpoint hooks `PrecisionPlugin.on_load_checkpoint` and `PrecisionPlugin.on_save_checkpoint` ([#14833](https://github.com/Lightning-AI/lightning/pull/14833))
 
 

src/pytorch_lightning/loggers/base.py

@@ -29,25 +29,7 @@ def rank_zero_experiment(fn: Callable) -> Callable:
 
 
 class LightningLoggerBase(logger.Logger):
-    """Base class for experiment loggers.
-
-    Args:
-        agg_key_funcs:
-            Dictionary which maps a metric name to a function, which will
-            aggregate the metric values for the same steps.
-        agg_default_func:
-            Default function to aggregate metric values. If some metric name
-            is not presented in the `agg_key_funcs` dictionary, then the
-            `agg_default_func` will be used for aggregation.
-
-        .. deprecated:: v1.6
-            The parameters `agg_key_funcs` and `agg_default_func` are deprecated
-            in v1.6 and will be removed in v1.8.
-
-    Note:
-        The `agg_key_funcs` and `agg_default_func` arguments are used only when
-        one logs metrics with the :meth:`~LightningLoggerBase.agg_and_log_metrics` method.
-    """
+    """Base class for experiment loggers."""
 
     def __init__(self, *args, **kwargs) -> None:  # type: ignore[no-untyped-def]
         rank_zero_deprecation(

src/pytorch_lightning/loggers/comet.py

@@ -19,7 +19,7 @@
 import logging
 import os
 from argparse import Namespace
-from typing import Any, Callable, Dict, Mapping, Optional, Sequence, Union
+from typing import Any, Dict, Mapping, Optional, Union
 
 from lightning_utilities.core.imports import module_available
 from torch import Tensor
@@ -219,15 +219,13 @@ def __init__(
         experiment_key: Optional[str] = None,
         offline: bool = False,
         prefix: str = "",
-        agg_key_funcs: Optional[Mapping[str, Callable[[Sequence[float]], float]]] = None,
-        agg_default_func: Optional[Callable[[Sequence[float]], float]] = None,
         **kwargs: Any,
     ):
         if comet_ml is None:
             raise ModuleNotFoundError(
                 "You want to use `comet_ml` logger which is not installed yet, install it with `pip install comet-ml`."
             )
-        super().__init__(agg_key_funcs=agg_key_funcs, agg_default_func=agg_default_func)
+        super().__init__()
         self._experiment = None
         self._save_dir: Optional[str]
         self.rest_api_key: Optional[str]

src/pytorch_lightning/loggers/logger.py

@@ -20,15 +20,15 @@
 from argparse import Namespace
 from collections import defaultdict
 from functools import wraps
-from typing import Any, Callable, Dict, List, Mapping, Optional, Sequence, Union
+from typing import Any, Callable, Dict, Mapping, Optional, Sequence, Union
 from weakref import ReferenceType
 
 import numpy as np
 from torch import Tensor
 
 import pytorch_lightning as pl
 from pytorch_lightning.callbacks import Checkpoint
-from pytorch_lightning.utilities.rank_zero import rank_zero_deprecation, rank_zero_only
+from pytorch_lightning.utilities.rank_zero import rank_zero_only
 
 
 def rank_zero_experiment(fn: Callable) -> Callable:
@@ -57,47 +57,7 @@ def get_experiment() -> Callable:
 
 
 class Logger(ABC):
-    """Base class for experiment loggers.
-
-    Args:
-        agg_key_funcs:
-            Dictionary which maps a metric name to a function, which will
-            aggregate the metric values for the same steps.
-        agg_default_func:
-            Default function to aggregate metric values. If some metric name
-            is not presented in the `agg_key_funcs` dictionary, then the
-            `agg_default_func` will be used for aggregation.
-
-        .. deprecated:: v1.6
-            The parameters `agg_key_funcs` and `agg_default_func` are deprecated
-            in v1.6 and will be removed in v1.8.
-
-    Note:
-        The `agg_key_funcs` and `agg_default_func` arguments are used only when
-        one logs metrics with the :meth:`~Logger.agg_and_log_metrics` method.
-    """
-
-    def __init__(
-        self,
-        agg_key_funcs: Optional[Mapping[str, Callable[[Sequence[float]], float]]] = None,
-        agg_default_func: Optional[Callable[[Sequence[float]], float]] = None,
-    ):
-        self._prev_step: int = -1
-        self._metrics_to_agg: List[Dict[str, float]] = []
-        if agg_key_funcs:
-            self._agg_key_funcs = agg_key_funcs
-            rank_zero_deprecation(
-                "The `agg_key_funcs` parameter for `Logger` was deprecated in v1.6" " and will be removed in v1.8."
-            )
-        else:
-            self._agg_key_funcs = {}
-        if agg_default_func:
-            self._agg_default_func = agg_default_func
-            rank_zero_deprecation(
-                "The `agg_default_func` parameter for `Logger` was deprecated in v1.6" " and will be removed in v1.8."
-            )
-        else:
-            self._agg_default_func = np.mean
+    """Base class for experiment loggers."""
 
     def after_save_checkpoint(self, checkpoint_callback: "ReferenceType[Checkpoint]") -> None:
         """Called after model checkpoint callback saves a new checkpoint.
@@ -107,52 +67,9 @@ def after_save_checkpoint(self, checkpoint_callback: "ReferenceType[Checkpoint]"
         """
         pass
 
-    def update_agg_funcs(
-        self,
-        agg_key_funcs: Optional[Mapping[str, Callable[[Sequence[float]], float]]] = None,
-        agg_default_func: Callable[[Sequence[float]], float] = np.mean,
-    ) -> None:
-        """Update aggregation methods.
-
-        .. deprecated:: v1.6
-            `update_agg_funcs` is deprecated in v1.6 and will be removed in v1.8.
-
-        Args:
-            agg_key_funcs:
-                Dictionary which maps a metric name to a function, which will
-                aggregate the metric values for the same steps.
-            agg_default_func:
-                Default function to aggregate metric values. If some metric name
-                is not presented in the `agg_key_funcs` dictionary, then the
-                `agg_default_func` will be used for aggregation.
-        """
-        if agg_key_funcs:
-            self._agg_key_funcs.update(agg_key_funcs)
-        if agg_default_func:
-            self._agg_default_func = agg_default_func
-        rank_zero_deprecation("`Logger.update_agg_funcs` was deprecated in v1.6 and will be removed in v1.8.")
-
-    def agg_and_log_metrics(self, metrics: Dict[str, float], step: Optional[int] = None) -> None:
-        """Aggregates and records metrics. This method doesn't log the passed metrics instantaneously, but instead
-        it aggregates them and logs only if metrics are ready to be logged.
-
-        .. deprecated:: v1.6
-            This method is deprecated in v1.6 and will be removed in v1.8.
-            Please use `Logger.log_metrics` instead.
-
-        Args:
-            metrics: Dictionary with metric names as keys and measured quantities as values
-            step: Step number at which the metrics should be recorded
-        """
-        self.log_metrics(metrics=metrics, step=step)
-
     @abstractmethod
     def log_metrics(self, metrics: Dict[str, float], step: Optional[int] = None) -> None:
-        """
-        Records metrics.
-        This method logs metrics as as soon as it received them. If you want to aggregate
-        metrics for one specific `step`, use the
-        :meth:`~pytorch_lightning.loggers.base.Logger.agg_and_log_metrics` method.
+        """Records metrics. This method logs metrics as soon as it received them.
 
         Args:
             metrics: Dictionary with metric names as keys and measured quantities as values
@@ -273,7 +190,8 @@ def method(*args: Any, **kwargs: Any) -> None:
         return method
 
 
-def merge_dicts(
+# TODO: this should have been deprecated
+def merge_dicts(  # pragma: no cover
     dicts: Sequence[Mapping],
     agg_key_funcs: Optional[Mapping] = None,
     default_func: Callable[[Sequence[float]], float] = np.mean,

src/pytorch_lightning/loggers/neptune.py

@@ -22,7 +22,7 @@
 import logging
 import os
 from argparse import Namespace
-from typing import Any, Callable, Dict, Generator, List, Mapping, Optional, Sequence, Set, Union
+from typing import Any, Dict, Generator, List, Optional, Set, Union
 from weakref import ReferenceType
 
 from lightning_utilities.core.imports import RequirementCache
@@ -227,15 +227,13 @@ def __init__(
         run: Optional["Run"] = None,
         log_model_checkpoints: Optional[bool] = True,
         prefix: str = "training",
-        agg_key_funcs: Optional[Mapping[str, Callable[[Sequence[float]], float]]] = None,
-        agg_default_func: Optional[Callable[[Sequence[float]], float]] = None,
         **neptune_run_kwargs: Any,
     ):
         if not _NEPTUNE_AVAILABLE:
             raise ModuleNotFoundError(str(_NEPTUNE_AVAILABLE))
         # verify if user passed proper init arguments
         self._verify_input_arguments(api_key, project, name, run, neptune_run_kwargs)
-        super().__init__(agg_key_funcs=agg_key_funcs, agg_default_func=agg_default_func)
+        super().__init__()
         self._log_model_checkpoints = log_model_checkpoints
         self._prefix = prefix
         self._run_name = name

src/pytorch_lightning/loggers/tensorboard.py

@@ -19,7 +19,7 @@
 import logging
 import os
 from argparse import Namespace
-from typing import Any, Callable, Dict, Mapping, Optional, Sequence, Union
+from typing import Any, Dict, Mapping, Optional, Union
 
 import numpy as np
 from torch import Tensor
@@ -94,11 +94,9 @@ def __init__(
         default_hp_metric: bool = True,
         prefix: str = "",
         sub_dir: Optional[str] = None,
-        agg_key_funcs: Optional[Mapping[str, Callable[[Sequence[float]], float]]] = None,
-        agg_default_func: Optional[Callable[[Sequence[float]], float]] = None,
         **kwargs: Any,
     ):
-        super().__init__(agg_key_funcs=agg_key_funcs, agg_default_func=agg_default_func)
+        super().__init__()
         self._save_dir = save_dir
         self._name = name or ""
         self._version = version

src/pytorch_lightning/loggers/wandb.py

@@ -18,7 +18,7 @@
 import os
 from argparse import Namespace
 from pathlib import Path
-from typing import Any, Callable, Dict, List, Mapping, Optional, Sequence, Union
+from typing import Any, Dict, List, Mapping, Optional, Union
 from weakref import ReferenceType
 
 import torch.nn as nn
@@ -294,8 +294,6 @@ def __init__(
         log_model: Union[str, bool] = False,
         experiment: Union[Run, RunDisabled, None] = None,
         prefix: str = "",
-        agg_key_funcs: Optional[Mapping[str, Callable[[Sequence[float]], float]]] = None,
-        agg_default_func: Optional[Callable[[Sequence[float]], float]] = None,
         **kwargs: Any,
     ) -> None:
         if wandb is None:
@@ -318,7 +316,7 @@ def __init__(
                 "Hint: Upgrade with `pip install --upgrade wandb`."
             )
 
-        super().__init__(agg_key_funcs=agg_key_funcs, agg_default_func=agg_default_func)
+        super().__init__()
         self._offline = offline
         self._log_model = log_model
         self._prefix = prefix

src/pytorch_lightning/trainer/connectors/logger_connector/logger_connector.py

@@ -22,8 +22,6 @@
 from pytorch_lightning.loggers import Logger, TensorBoardLogger
 from pytorch_lightning.trainer.connectors.logger_connector.result import _METRICS, _OUT_DICT, _PBAR_DICT
 from pytorch_lightning.utilities.metrics import metrics_to_scalars
-from pytorch_lightning.utilities.model_helpers import is_overridden
-from pytorch_lightning.utilities.rank_zero import rank_zero_deprecation
 
 
 class LoggerConnector:
@@ -36,7 +34,6 @@ def __init__(self, trainer: "pl.Trainer") -> None:
         self._current_fx: Optional[str] = None
         self._batch_idx: Optional[int] = None
         self._split_idx: Optional[int] = None
-        self._override_agg_and_log_metrics: bool = False
 
     def on_trainer_init(
         self,
@@ -47,15 +44,6 @@ def on_trainer_init(
         self.configure_logger(logger)
         self.trainer.log_every_n_steps = log_every_n_steps
         self.trainer.move_metrics_to_cpu = move_metrics_to_cpu
-        for logger in self.trainer.loggers:
-            if is_overridden("agg_and_log_metrics", logger, Logger):
-                self._override_agg_and_log_metrics = True
-                rank_zero_deprecation(
-                    "`Logger.agg_and_log_metrics` is deprecated in v1.6 and will be removed"
-                    " in v1.8. `Trainer` will directly call `Logger.log_metrics` so custom"
-                    " loggers should not implement `Logger.agg_and_log_metrics`."
-                )
-                break
 
     @property
     def should_update_logs(self) -> bool:
@@ -104,10 +92,7 @@ def log_metrics(self, metrics: _OUT_DICT, step: Optional[int] = None) -> None:
 
         # log actual metrics
         for logger in self.trainer.loggers:
-            if self._override_agg_and_log_metrics:
-                logger.agg_and_log_metrics(metrics=scalar_metrics, step=step)
-            else:
-                logger.log_metrics(metrics=scalar_metrics, step=step)
+            logger.log_metrics(metrics=scalar_metrics, step=step)
             logger.save()
 
     """

tests/tests_pytorch/deprecated_api/test_remove_1-8.py

@@ -22,12 +22,10 @@
 from pytorch_lightning import Callback, Trainer
 from pytorch_lightning.callbacks import ModelCheckpoint
 from pytorch_lightning.demos.boring_classes import BoringDataModule, BoringModel
-from pytorch_lightning.loggers import CSVLogger, Logger
 from pytorch_lightning.profilers import AdvancedProfiler, SimpleProfiler
 from pytorch_lightning.strategies.ipu import LightningIPUModule
 from pytorch_lightning.trainer.configuration_validator import _check_datamodule_checkpoint_hooks
 from pytorch_lightning.trainer.states import RunningStage
-from pytorch_lightning.utilities.rank_zero import rank_zero_only
 
 
 def test_v1_8_0_on_init_start_end(tmpdir):
@@ -289,72 +287,6 @@ def on_before_accelerator_backend_setup(self, *args, **kwargs):
         trainer.fit(model)
 
 
-def test_v1_8_0_logger_agg_parameters():
-    class CustomLogger(Logger):
-        @rank_zero_only
-        def log_hyperparams(self, params):
-            pass
-
-        @rank_zero_only
-        def log_metrics(self, metrics, step):
-            pass
-
-        @property
-        def name(self):
-            pass
-
-        @property
-        def version(self):
-            pass
-
-    with pytest.deprecated_call(
-        match="The `agg_key_funcs` parameter for `Logger` was deprecated in v1.6" " and will be removed in v1.8."
-    ):
-        CustomLogger(agg_key_funcs={"mean", np.mean})
-
-    with pytest.deprecated_call(
-        match="The `agg_default_func` parameter for `Logger` was deprecated in v1.6" " and will be removed in v1.8."
-    ):
-        CustomLogger(agg_default_func=np.mean)
-
-    # Should have no deprecation warning
-    logger = CustomLogger()
-
-    with pytest.deprecated_call(match="`Logger.update_agg_funcs` was deprecated in v1.6 and will be removed in v1.8."):
-        logger.update_agg_funcs()
-
-
-def test_v1_8_0_deprecated_agg_and_log_metrics_override(tmpdir):
-    class AggregationOverrideLogger(CSVLogger):
-        @rank_zero_only
-        def agg_and_log_metrics(self, metrics, step):
-            self.log_metrics(metrics=metrics, step=step)
-
-    logger = AggregationOverrideLogger(tmpdir)
-    logger2 = CSVLogger(tmpdir)
-    logger3 = CSVLogger(tmpdir)
-
-    # Test single loggers
-    with pytest.deprecated_call(
-        match="`Logger.agg_and_log_metrics` is deprecated in v1.6 and will be removed"
-        " in v1.8. `Trainer` will directly call `Logger.log_metrics` so custom"
-        " loggers should not implement `Logger.agg_and_log_metrics`."
-    ):
-        Trainer(logger=logger)
-    # Should have no deprecation warning
-    Trainer(logger=logger2)
-
-    # Test multiple loggers
-    with pytest.deprecated_call(
-        match="`Logger.agg_and_log_metrics` is deprecated in v1.6 and will be removed"
-        " in v1.8. `Trainer` will directly call `Logger.log_metrics` so custom"
-        " loggers should not implement `Logger.agg_and_log_metrics`."
-    ):
-        Trainer(logger=[logger, logger3])
-    # Should have no deprecation warning
-    Trainer(logger=[logger2, logger3])
-
-
 def test_v1_8_0_callback_on_pretrain_routine_start_end(tmpdir):
     class TestCallback(Callback):
         def on_pretrain_routine_start(self, trainer, pl_module):