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Source code for pytorch_lightning.loggers.neptune

# 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.
"""
Neptune Logger
--------------
"""
__all__ = [
    "NeptuneLogger",
]

import logging
import os
import warnings
from argparse import Namespace
from functools import reduce
from typing import Any, Dict, Generator, Optional, Set, Union
from weakref import ReferenceType

import torch

from pytorch_lightning import __version__
from pytorch_lightning.callbacks.model_checkpoint import ModelCheckpoint
from pytorch_lightning.loggers.base import LightningLoggerBase, rank_zero_experiment
from pytorch_lightning.utilities import rank_zero_only
from pytorch_lightning.utilities.imports import _NEPTUNE_AVAILABLE, _NEPTUNE_GREATER_EQUAL_0_9
from pytorch_lightning.utilities.model_summary import ModelSummary

if _NEPTUNE_AVAILABLE and _NEPTUNE_GREATER_EQUAL_0_9:
    try:
        from neptune import new as neptune
        from neptune.new.exceptions import NeptuneLegacyProjectException, NeptuneOfflineModeFetchException
        from neptune.new.run import Run
        from neptune.new.types import File as NeptuneFile
    except ModuleNotFoundError:
        import neptune
        from neptune.exceptions import NeptuneLegacyProjectException
        from neptune.run import Run
        from neptune.types import File as NeptuneFile
else:
    # needed for test mocks, and function signatures
    neptune, Run, NeptuneFile = None, None, None

log = logging.getLogger(__name__)

_INTEGRATION_VERSION_KEY = "source_code/integrations/pytorch-lightning"

# kwargs used in previous NeptuneLogger version, now deprecated
_LEGACY_NEPTUNE_INIT_KWARGS = [
    "project_name",
    "offline_mode",
    "experiment_name",
    "experiment_id",
    "params",
    "properties",
    "upload_source_files",
    "abort_callback",
    "logger",
    "upload_stdout",
    "upload_stderr",
    "send_hardware_metrics",
    "run_monitoring_thread",
    "handle_uncaught_exceptions",
    "git_info",
    "hostname",
    "notebook_id",
    "notebook_path",
]

# kwargs used in legacy NeptuneLogger from neptune-pytorch-lightning package
_LEGACY_NEPTUNE_LOGGER_KWARGS = [
    "base_namespace",
    "close_after_fit",
]


[docs]class NeptuneLogger(LightningLoggerBase): r""" Log using `Neptune <https://neptune.ai>`_. Install it with pip: .. code-block:: bash pip install neptune-client or conda: .. code-block:: bash conda install -c conda-forge neptune-client **Quickstart** Pass NeptuneLogger instance to the Trainer to log metadata with Neptune: .. code-block:: python from pytorch_lightning import Trainer from pytorch_lightning.loggers import NeptuneLogger neptune_logger = NeptuneLogger( api_key="ANONYMOUS", # replace with your own project="common/pytorch-lightning-integration", # format "<WORKSPACE/PROJECT>" tags=["training", "resnet"], # optional ) trainer = Trainer(max_epochs=10, logger=neptune_logger) **How to use NeptuneLogger?** Use the logger anywhere in your :class:`~pytorch_lightning.core.lightning.LightningModule` as follows: .. code-block:: python from neptune.new.types import File from pytorch_lightning import LightningModule class LitModel(LightningModule): def training_step(self, batch, batch_idx): # log metrics acc = ... self.log("train/loss", loss) def any_lightning_module_function_or_hook(self): # log images img = ... self.logger.experiment["train/misclassified_images"].log(File.as_image(img)) # generic recipe metadata = ... self.logger.experiment["your/metadata/structure"].log(metadata) Note that syntax: ``self.logger.experiment["your/metadata/structure"].log(metadata)`` is specific to Neptune and it extends logger capabilities. Specifically, it allows you to log various types of metadata like scores, files, images, interactive visuals, CSVs, etc. Refer to the `Neptune docs <https://docs.neptune.ai/you-should-know/logging-metadata#essential-logging-methods>`_ for more detailed explanations. You can also use regular logger methods ``log_metrics()``, and ``log_hyperparams()`` with NeptuneLogger as these are also supported. **Log after fitting or testing is finished** You can log objects after the fitting or testing methods are finished: .. code-block:: python neptune_logger = NeptuneLogger(project="common/pytorch-lightning-integration") trainer = pl.Trainer(logger=neptune_logger) model = ... datamodule = ... trainer.fit(model, datamodule=datamodule) trainer.test(model, datamodule=datamodule) # Log objects after `fit` or `test` methods # model summary neptune_logger.log_model_summary(model=model, max_depth=-1) # generic recipe metadata = ... neptune_logger.experiment["your/metadata/structure"].log(metadata) **Log model checkpoints** If you have :class:`~pytorch_lightning.callbacks.ModelCheckpoint` configured, Neptune logger automatically logs model checkpoints. Model weights will be uploaded to the: "model/checkpoints" namespace in the Neptune Run. You can disable this option: .. code-block:: python neptune_logger = NeptuneLogger(project="common/pytorch-lightning-integration", log_model_checkpoints=False) **Pass additional parameters to the Neptune run** You can also pass ``neptune_run_kwargs`` to specify the run in the greater detail, like ``tags`` or ``description``: .. testcode:: from pytorch_lightning import Trainer from pytorch_lightning.loggers import NeptuneLogger neptune_logger = NeptuneLogger( project="common/pytorch-lightning-integration", name="lightning-run", description="mlp quick run with pytorch-lightning", tags=["mlp", "quick-run"], ) trainer = Trainer(max_epochs=3, logger=neptune_logger) Check `run documentation <https://docs.neptune.ai/essentials/api-reference/run>`_ for more info about additional run parameters. **Details about Neptune run structure** Runs can be viewed as nested dictionary-like structures that you can define in your code. Thanks to this you can easily organize your metadata in a way that is most convenient for you. The hierarchical structure that you apply to your metadata will be reflected later in the UI. You can organize this way any type of metadata - images, parameters, metrics, model checkpoint, CSV files, etc. See Also: - Read about `what object you can log to Neptune <https://docs.neptune.ai/you-should-know/what-can-you-log-and-display>`_. - Check `example run <https://app.neptune.ai/o/common/org/pytorch-lightning-integration/e/PTL-1/all>`_ with multiple types of metadata logged. - For more detailed info check `user guide <https://docs.neptune.ai/integrations-and-supported-tools/model-training/pytorch-lightning>`_. Args: api_key: Optional. Neptune API token, found on https://neptune.ai upon registration. Read: `how to find and set Neptune API token <https://docs.neptune.ai/administration/security-and-privacy/ how-to-find-and-set-neptune-api-token>`_. It is recommended to keep it in the `NEPTUNE_API_TOKEN` environment variable and then you can drop ``api_key=None``. project: Optional. Name of a project in a form of "my_workspace/my_project" for example "tom/mask-rcnn". If ``None``, the value of `NEPTUNE_PROJECT` environment variable will be taken. You need to create the project in https://neptune.ai first. name: Optional. Editable name of the run. Run name appears in the "all metadata/sys" section in Neptune UI. run: Optional. Default is ``None``. The Neptune ``Run`` object. If specified, this `Run`` will be used for logging, instead of a new Run. When run object is passed you can't specify other neptune properties. log_model_checkpoints: Optional. Default is ``True``. Log model checkpoint to Neptune. Works only if ``ModelCheckpoint`` is passed to the ``Trainer``. prefix: Optional. Default is ``"training"``. Root namespace for all metadata logging. \**neptune_run_kwargs: Additional arguments like ``tags``, ``description``, ``capture_stdout``, etc. used when run is created. Raises: ModuleNotFoundError: If required Neptune package in version >=0.9 is not installed on the device. TypeError: If configured project has not been migrated to new structure yet. ValueError: If argument passed to the logger's constructor is incorrect. """ LOGGER_JOIN_CHAR = "/" PARAMETERS_KEY = "hyperparams" ARTIFACTS_KEY = "artifacts" def __init__( self, *, # force users to call `NeptuneLogger` initializer with `kwargs` api_key: Optional[str] = None, project: Optional[str] = None, name: Optional[str] = None, run: Optional["Run"] = None, log_model_checkpoints: Optional[bool] = True, prefix: str = "training", **neptune_run_kwargs, ): # verify if user passed proper init arguments self._verify_input_arguments(api_key, project, name, run, neptune_run_kwargs) super().__init__() self._log_model_checkpoints = log_model_checkpoints self._prefix = prefix self._run_instance = self._init_run_instance(api_key, project, name, run, neptune_run_kwargs) self._run_short_id = self.run._short_id # skipcq: PYL-W0212 try: self.run.wait() self._run_name = self._run_instance["sys/name"].fetch() except NeptuneOfflineModeFetchException: self._run_name = "offline-name" def _init_run_instance(self, api_key, project, name, run, neptune_run_kwargs) -> Run: if run is not None: run_instance = run else: try: run_instance = neptune.init( project=project, api_token=api_key, name=name, **neptune_run_kwargs, ) except NeptuneLegacyProjectException as e: raise TypeError( f"""Project {project} has not been migrated to the new structure. You can still integrate it with the Neptune logger using legacy Python API available as part of neptune-contrib package: - https://docs-legacy.neptune.ai/integrations/pytorch_lightning.html\n """ ) from e # make sure that we've log integration version for both newly created and outside `Run` instances run_instance[_INTEGRATION_VERSION_KEY] = __version__ # keep api_key and project, they will be required when resuming Run for pickled logger self._api_key = api_key self._project_name = run_instance._project_name # skipcq: PYL-W0212 return run_instance def _construct_path_with_prefix(self, *keys) -> str: """Return sequence of keys joined by `LOGGER_JOIN_CHAR`, started with `_prefix` if defined.""" if self._prefix: return self.LOGGER_JOIN_CHAR.join([self._prefix, *keys]) return self.LOGGER_JOIN_CHAR.join(keys) @staticmethod def _verify_input_arguments( api_key: Optional[str], project: Optional[str], name: Optional[str], run: Optional["Run"], neptune_run_kwargs: dict, ): legacy_kwargs_msg = ( "Following kwargs are deprecated: {legacy_kwargs}.\n" "If you are looking for the Neptune logger using legacy Python API," " it's still available as part of neptune-contrib package:\n" " - https://docs-legacy.neptune.ai/integrations/pytorch_lightning.html\n" "The NeptuneLogger was re-written to use the neptune.new Python API\n" " - https://neptune.ai/blog/neptune-new\n" " - https://docs.neptune.ai/integrations-and-supported-tools/model-training/pytorch-lightning\n" "You should use arguments accepted by either NeptuneLogger.init() or neptune.init()" ) # check if user used legacy kwargs expected in `NeptuneLegacyLogger` used_legacy_kwargs = [ legacy_kwarg for legacy_kwarg in neptune_run_kwargs if legacy_kwarg in _LEGACY_NEPTUNE_INIT_KWARGS ] if used_legacy_kwargs: raise ValueError(legacy_kwargs_msg.format(legacy_kwargs=used_legacy_kwargs)) # check if user used legacy kwargs expected in `NeptuneLogger` from neptune-pytorch-lightning package used_legacy_neptune_kwargs = [ legacy_kwarg for legacy_kwarg in neptune_run_kwargs if legacy_kwarg in _LEGACY_NEPTUNE_LOGGER_KWARGS ] if used_legacy_neptune_kwargs: raise ValueError(legacy_kwargs_msg.format(legacy_kwargs=used_legacy_neptune_kwargs)) # check if user passed new client `Run` object if run is not None and not isinstance(run, Run): raise ValueError( "Run parameter expected to be of type `neptune.new.Run`.\n" "If you are looking for the Neptune logger using legacy Python API," " it's still available as part of neptune-contrib package:\n" " - https://docs-legacy.neptune.ai/integrations/pytorch_lightning.html\n" "The NeptuneLogger was re-written to use the neptune.new Python API\n" " - https://neptune.ai/blog/neptune-new\n" " - https://docs.neptune.ai/integrations-and-supported-tools/model-training/pytorch-lightning\n" ) # check if user passed redundant neptune.init arguments when passed run any_neptune_init_arg_passed = any(arg is not None for arg in [api_key, project, name]) or neptune_run_kwargs if run is not None and any_neptune_init_arg_passed: raise ValueError( "When an already initialized run object is provided" " you can't provide other neptune.init() parameters.\n" ) def __getstate__(self): state = self.__dict__.copy() # Run instance can't be pickled state["_run_instance"] = None return state def __setstate__(self, state): self.__dict__ = state self._run_instance = neptune.init(project=self._project_name, api_token=self._api_key, run=self._run_short_id) @property @rank_zero_experiment def experiment(self) -> Run: r""" Actual Neptune run object. Allows you to use neptune logging features in your :class:`~pytorch_lightning.core.lightning.LightningModule`. Example:: class LitModel(LightningModule): def training_step(self, batch, batch_idx): # log metrics acc = ... self.logger.experiment["train/acc"].log(acc) # log images img = ... self.logger.experiment["train/misclassified_images"].log(File.as_image(img)) Note that syntax: ``self.logger.experiment["your/metadata/structure"].log(metadata)`` is specific to Neptune and it extends logger capabilities. Specifically, it allows you to log various types of metadata like scores, files, images, interactive visuals, CSVs, etc. Refer to the `Neptune docs <https://docs.neptune.ai/you-should-know/logging-metadata#essential-logging-methods>`_ for more detailed explanations. You can also use regular logger methods ``log_metrics()``, and ``log_hyperparams()`` with NeptuneLogger as these are also supported. """ return self.run @property def run(self) -> Run: return self._run_instance
[docs] @rank_zero_only def log_hyperparams(self, params: Union[Dict[str, Any], Namespace]) -> None: # skipcq: PYL-W0221 r""" Log hyper-parameters to the run. Hyperparams will be logged under the "<prefix>/hyperparams" namespace. Note: You can also log parameters by directly using the logger instance: ``neptune_logger.experiment["model/hyper-parameters"] = params_dict``. In this way you can keep hierarchical structure of the parameters. Args: params: `dict`. Python dictionary structure with parameters. Example:: from pytorch_lightning.loggers import NeptuneLogger PARAMS = { "batch_size": 64, "lr": 0.07, "decay_factor": 0.97 } neptune_logger = NeptuneLogger( api_key="ANONYMOUS", project="common/pytorch-lightning-integration" ) neptune_logger.log_hyperparams(PARAMS) """ params = self._convert_params(params) params = self._sanitize_callable_params(params) parameters_key = self.PARAMETERS_KEY parameters_key = self._construct_path_with_prefix(parameters_key) self.run[parameters_key] = params
[docs] @rank_zero_only def log_metrics(self, metrics: Dict[str, Union[torch.Tensor, float]], step: Optional[int] = None) -> None: """Log metrics (numeric values) in Neptune runs. Args: metrics: Dictionary with metric names as keys and measured quantities as values. step: Step number at which the metrics should be recorded, currently ignored. """ if rank_zero_only.rank != 0: raise ValueError("run tried to log from global_rank != 0") metrics = self._add_prefix(metrics) for key, val in metrics.items(): # `step` is ignored because Neptune expects strictly increasing step values which # Lightning does not always guarantee. self.experiment[key].log(val)
[docs] @rank_zero_only def finalize(self, status: str) -> None: if status: self.experiment[self._construct_path_with_prefix("status")] = status super().finalize(status)
@property def save_dir(self) -> Optional[str]: """Gets the save directory of the experiment which in this case is ``None`` because Neptune does not save locally. Returns: the root directory where experiment logs get saved """ return os.path.join(os.getcwd(), ".neptune") def log_model_summary(self, model, max_depth=-1): model_str = str(ModelSummary(model=model, max_depth=max_depth)) self.experiment[self._construct_path_with_prefix("model/summary")] = neptune.types.File.from_content( content=model_str, extension="txt" )
[docs] def after_save_checkpoint(self, checkpoint_callback: "ReferenceType[ModelCheckpoint]") -> None: """Automatically log checkpointed model. Called after model checkpoint callback saves a new checkpoint. Args: checkpoint_callback: the model checkpoint callback instance """ if not self._log_model_checkpoints: return file_names = set() checkpoints_namespace = self._construct_path_with_prefix("model/checkpoints") # save last model if checkpoint_callback.last_model_path: model_last_name = self._get_full_model_name(checkpoint_callback.last_model_path, checkpoint_callback) file_names.add(model_last_name) self.experiment[f"{checkpoints_namespace}/{model_last_name}"].upload(checkpoint_callback.last_model_path) # save best k models for key in checkpoint_callback.best_k_models.keys(): model_name = self._get_full_model_name(key, checkpoint_callback) file_names.add(model_name) self.experiment[f"{checkpoints_namespace}/{model_name}"].upload(key) # log best model path and checkpoint if checkpoint_callback.best_model_path: self.experiment[ self._construct_path_with_prefix("model/best_model_path") ] = checkpoint_callback.best_model_path model_name = self._get_full_model_name(checkpoint_callback.best_model_path, checkpoint_callback) file_names.add(model_name) self.experiment[f"{checkpoints_namespace}/{model_name}"].upload(checkpoint_callback.best_model_path) # remove old models logged to experiment if they are not part of best k models at this point if self.experiment.exists(checkpoints_namespace): exp_structure = self.experiment.get_structure() uploaded_model_names = self._get_full_model_names_from_exp_structure(exp_structure, checkpoints_namespace) for file_to_drop in list(uploaded_model_names - file_names): del self.experiment[f"{checkpoints_namespace}/{file_to_drop}"] # log best model score if checkpoint_callback.best_model_score: self.experiment[self._construct_path_with_prefix("model/best_model_score")] = ( checkpoint_callback.best_model_score.cpu().detach().numpy() )
@staticmethod def _get_full_model_name(model_path: str, checkpoint_callback: "ReferenceType[ModelCheckpoint]") -> str: """Returns model name which is string `modle_path` appended to `checkpoint_callback.dirpath`.""" expected_model_path = f"{checkpoint_callback.dirpath}{os.path.sep}" if not model_path.startswith(expected_model_path): raise ValueError(f"{model_path} was expected to start with {expected_model_path}.") return model_path[len(expected_model_path) :] @classmethod def _get_full_model_names_from_exp_structure(cls, exp_structure: dict, namespace: str) -> Set[str]: """Returns all paths to properties which were already logged in `namespace`""" structure_keys = namespace.split(cls.LOGGER_JOIN_CHAR) uploaded_models_dict = reduce(lambda d, k: d[k], [exp_structure, *structure_keys]) return set(cls._dict_paths(uploaded_models_dict)) @classmethod def _dict_paths(cls, d: dict, path_in_build: str = None) -> Generator: for k, v in d.items(): path = f"{path_in_build}/{k}" if path_in_build is not None else k if not isinstance(v, dict): yield path else: yield from cls._dict_paths(v, path) @property def name(self) -> str: """Return the experiment name or 'offline-name' when exp is run in offline mode.""" return self._run_name @property def version(self) -> str: """Return the experiment version. It's Neptune Run's short_id """ return self._run_short_id @staticmethod def _signal_deprecated_api_usage(f_name, sample_code, raise_exception=False): msg_suffix = ( f"If you are looking for the Neptune logger using legacy Python API," f" it's still available as part of neptune-contrib package:\n" f" - https://docs-legacy.neptune.ai/integrations/pytorch_lightning.html\n" f"The NeptuneLogger was re-written to use the neptune.new Python API\n" f" - https://neptune.ai/blog/neptune-new\n" f" - https://docs.neptune.ai/integrations-and-supported-tools/model-training/pytorch-lightning\n" f"Instead of `logger.{f_name}` you can use:\n" f"\t{sample_code}" ) if not raise_exception: warnings.warn( "The function you've used is deprecated in v1.5.0 and will be removed in v1.7.0. " + msg_suffix ) else: raise ValueError("The function you've used is deprecated.\n" + msg_suffix) @rank_zero_only def log_metric(self, metric_name: str, metric_value: Union[torch.Tensor, float, str], step: Optional[int] = None): key = f"{self._prefix}/{metric_name}" self._signal_deprecated_api_usage("log_metric", f"logger.run['{key}'].log(42)") if torch.is_tensor(metric_value): metric_value = metric_value.cpu().detach() self.run[key].log(metric_value, step=step)
[docs] @rank_zero_only def log_text(self, log_name: str, text: str, step: Optional[int] = None) -> None: key = f"{self._prefix}/{log_name}" self._signal_deprecated_api_usage("log_text", f"logger.run['{key}].log('text')") self.run[key].log(str(text), step=step)
[docs] @rank_zero_only def log_image(self, log_name: str, image: Union[str, Any], step: Optional[int] = None) -> None: key = f"{self._prefix}/{log_name}" self._signal_deprecated_api_usage("log_image", f"logger.run['{key}'].log(File('path_to_image'))") if isinstance(image, str): # if `img` is path to file, convert it to file object image = NeptuneFile(image) self.run[key].log(image, step=step)
@rank_zero_only def log_artifact(self, artifact: str, destination: Optional[str] = None) -> None: key = f"{self._prefix}/{self.ARTIFACTS_KEY}/{artifact}" self._signal_deprecated_api_usage("log_artifact", f"logger.run['{key}].log('path_to_file')") self.run[key].log(destination) @rank_zero_only def set_property(self, *args, **kwargs): self._signal_deprecated_api_usage( "log_artifact", f"logger.run['{self._prefix}/{self.PARAMETERS_KEY}/key'].log(value)", raise_exception=True ) @rank_zero_only def append_tags(self, *args, **kwargs): self._signal_deprecated_api_usage( "append_tags", "logger.run['sys/tags'].add(['foo', 'bar'])", raise_exception=True )

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