classification

Classification(config, output, checkpoint_path=None, lr_multiplier=None, gradcam=False, report=False, run_test=False)

Bases: Generic[ClassificationDataModuleT], LightningTask[ClassificationDataModuleT]

Classification Task.

Parameters:

• config (DictConfig) –

  The experiment configuration

• output (DictConfig) –

  The otuput configuration.

• gradcam (bool, default: False ) –

  Whether to compute gradcams

• checkpoint_path (Optional[str], default: None ) –

  The path to the checkpoint to load the model from. Defaults to None.

• lr_multiplier (Optional[float], default: None ) –

  The multiplier for the backbone learning rate. Defaults to None.

• output (DictConfig) –

  The ouput configuration (under task config). It contains the bool "example" to generate figs of discordant/concordant predictions.

• report (bool, default: False ) –

  Whether to generate a report containing the results after test phase

• run_test (bool, default: False ) –

  Whether to run the test phase.

Source code in quadra/tasks/classification.py

def __init__(
    self,
    config: DictConfig,
    output: DictConfig,
    checkpoint_path: Optional[str] = None,
    lr_multiplier: Optional[float] = None,
    gradcam: bool = False,
    report: bool = False,
    run_test: bool = False,
):
    super().__init__(
        config=config,
        checkpoint_path=checkpoint_path,
        run_test=run_test,
        report=report,
    )
    self.output = output
    self.gradcam = gradcam
    self._lr_multiplier = lr_multiplier
    self._pre_classifier: nn.Module
    self._classifier: nn.Module
    self._model: nn.Module
    self._optimizer: torch.optim.Optimizer
    self._scheduler: torch.optim.lr_scheduler._LRScheduler
    self.model_json: Optional[Dict[str, Any]] = None
    self.export_folder: str = "deployment_model"
    self.deploy_info_file: str = "model.json"
    self.report_confmat: pd.DataFrame

len_train_dataloader: int property

Get the length of the train dataloader.

optimizer: torch.optim.Optimizer property writable

Get the optimizer.

scheduler: torch.optim.lr_scheduler._LRScheduler property writable

Get the scheduler.

export()

Generate deployment models for the task.

Source code in quadra/tasks/classification.py

def export(self) -> None:
    """Generate deployment models for the task."""
    if self.datamodule.class_to_idx is None:
        log.warning(
            "No `class_to_idx` found in the datamodule, class information will not be saved in the model.json"
        )
        idx_to_class = {}
    else:
        idx_to_class = {v: k for k, v in self.datamodule.class_to_idx.items()}

    if self.trainer.checkpoint_callback is None:
        log.warning("No checkpoint callback found in the trainer, exporting the last model weights")
    else:
        best_model_path = self.trainer.checkpoint_callback.best_model_path  # type: ignore[attr-defined]
        log.info("Saving deployment model for %s checkpoint", best_model_path)

        module = self.module.load_from_checkpoint(
            best_model_path,
            model=self.module.model,
            optimizer=self.optimizer,
            lr_scheduler=self.scheduler,
            criterion=self.module.criterion,
            gradcam=False,
        )

    input_shapes = self.config.export.input_shapes

    # TODO: What happens if we have 64 precision?
    half_precision = "16" in self.trainer.precision

    self.model_json, export_paths = export_model(
        config=self.config,
        model=module.model,
        export_folder=self.export_folder,
        half_precision=half_precision,
        input_shapes=input_shapes,
        idx_to_class=idx_to_class,
    )

    if len(export_paths) == 0:
        return

    with open(os.path.join(self.export_folder, self.deploy_info_file), "w") as f:
        json.dump(self.model_json, f)

freeze_layers(freeze_parameters_name)

Freeze layers specified in freeze_parameters_name.

Parameters:

• freeze_parameters_name (List[str]) –

  Layers that will be frozen during training.

Source code in quadra/tasks/classification.py

def freeze_layers(self, freeze_parameters_name: List[str]):
    """Freeze layers specified in freeze_parameters_name.

    Args:
        freeze_parameters_name: Layers that will be frozen during training.

    """
    count_frozen = 0
    for name, param in self.model.named_parameters():
        if any(x in name.split(".")[1] for x in freeze_parameters_name):
            log.debug("Freezing layer %s", name)
            param.requires_grad = False

        if not param.requires_grad:
            count_frozen += 1

    log.info("Frozen %d parameters", count_frozen)

generate_report()

Generate a report for the task.

Source code in quadra/tasks/classification.py

def generate_report(self) -> None:
    """Generate a report for the task."""
    if self.datamodule.class_to_idx is None:
        log.warning("No `class_to_idx` found in the datamodule, report will not be generated")
        return

    if isinstance(self.datamodule, MultilabelClassificationDataModule):
        log.warning("Report generation is not supported for multilabel classification tasks at the moment.")
        return

    log.info("Generating report!")
    if not self.run_test or self.config.trainer.get("fast_dev_run"):
        self.datamodule.setup(stage="test")
    best_model_path = self.trainer.checkpoint_callback.best_model_path  # type: ignore[union-attr]
    predictions_outputs = self.trainer.predict(
        model=self.module, datamodule=self.datamodule, ckpt_path=best_model_path
    )
    if not predictions_outputs:
        log.warning("There is no prediction to generate the report. Skipping report generation.")
        return
    all_outputs = [x[0] for x in predictions_outputs]
    if not all_outputs:
        log.warning("There is no prediction to generate the report. Skipping report generation.")
        return
    all_outputs = [item for sublist in all_outputs for item in sublist]
    all_targets = [target.tolist() for im, target in self.datamodule.test_dataloader()]
    all_targets = [item for sublist in all_targets for item in sublist]

    if self.module.gradcam:
        grayscale_cams = [x[1] for x in predictions_outputs]
        grayscale_cams = [item for sublist in grayscale_cams for item in sublist]
        grayscale_cams = np.stack(grayscale_cams)  # N x H x W
    else:
        grayscale_cams = None

    # creating confusion matrix
    idx_to_class = {v: k for k, v in self.datamodule.class_to_idx.items()}
    _, self.report_confmat, accuracy = get_results(
        test_labels=all_targets,
        pred_labels=all_outputs,
        idx_to_labels=idx_to_class,
    )
    output_folder_test = "test"
    test_dataloader = self.datamodule.test_dataloader()
    test_dataset = cast(ImageClassificationListDataset, test_dataloader.dataset)
    res = pd.DataFrame(
        {
            "sample": list(test_dataset.x),
            "real_label": all_targets,
            "pred_label": all_outputs,
        }
    )
    os.makedirs(output_folder_test, exist_ok=True)
    save_classification_result(
        results=res,
        output_folder=output_folder_test,
        confmat=self.report_confmat,
        accuracy=accuracy,
        test_dataloader=self.datamodule.test_dataloader(),
        config=self.config,
        output=self.output,
        grayscale_cams=grayscale_cams,
    )

    if len(self.logger) > 0:
        mflow_logger = get_mlflow_logger(trainer=self.trainer)
        tensorboard_logger = utils.get_tensorboard_logger(trainer=self.trainer)
        artifacts = glob.glob(os.path.join(output_folder_test, "**/*"), recursive=True)
        if self.config.core.get("upload_artifacts") and len(artifacts) > 0:
            if mflow_logger is not None:
                log.info("Uploading artifacts to MLFlow")
                for a in artifacts:
                    if os.path.isdir(a):
                        continue

                    dirname = Path(a).parent.name
                    mflow_logger.experiment.log_artifact(
                        run_id=mflow_logger.run_id,
                        local_path=a,
                        artifact_path=os.path.join("classification_output", dirname),
                    )
            if tensorboard_logger is not None:
                log.info("Uploading artifacts to Tensorboard")
                for a in artifacts:
                    if os.path.isdir(a):
                        continue

                    ext = os.path.splitext(a)[1].lower()

                    if ext in [".png", ".jpg", ".jpeg", ".bmp", ".tiff", ".tif", ".gif"]:
                        try:
                            img = cv2.imread(a)
                            img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
                        except cv2.error:
                            log.info("Could not upload artifact image %s", a)
                            continue
                        output_path = os.path.sep.join(a.split(os.path.sep)[-2:])
                        tensorboard_logger.experiment.add_image(output_path, img, 0, dataformats="HWC")
                    else:
                        utils.upload_file_tensorboard(a, tensorboard_logger)

module(module_config)

Set the module of the model.

Source code in quadra/tasks/classification.py

@LightningTask.module.setter
def module(self, module_config):
    """Set the module of the model."""
    module = hydra.utils.instantiate(
        module_config,
        model=self.model,
        optimizer=self.optimizer,
        lr_scheduler=self.scheduler,
        gradcam=self.gradcam,
    )
    if self.checkpoint_path is not None:
        log.info("Loading model from lightning checkpoint: %s", self.checkpoint_path)
        module = module.load_from_checkpoint(
            self.checkpoint_path,
            model=self.model,
            optimizer=self.optimizer,
            lr_scheduler=self.scheduler,
            criterion=module.criterion,
            gradcam=self.gradcam,
        )
    self._module = module

prepare()

Prepare the experiment.

Source code in quadra/tasks/classification.py

def prepare(self) -> None:
    """Prepare the experiment."""
    super().prepare()
    self.model = self.config.model
    self.optimizer = self.config.optimizer
    self.scheduler = self.config.scheduler
    self.module = self.config.model.module

test()

Test the model.

Source code in quadra/tasks/classification.py

def test(self) -> None:
    """Test the model."""
    if not self.config.trainer.get("fast_dev_run"):
        if self.trainer.checkpoint_callback is None:
            raise ValueError("Checkpoint callback is not defined!")
        log.info("Starting testing!")
        self.datamodule.setup(stage="test")
        log.info("Using best epoch's weights for testing.")
        self.trainer.test(datamodule=self.datamodule, model=self.module, ckpt_path="best")

ClassificationEvaluation(config, output, model_path, report=True, gradcam=False, device=None)

Bases: Evaluation[ClassificationDataModuleT]

Perform a test on an imported Classification pytorch model.

Parameters:

• config (DictConfig) –

  Task configuration

• output (DictConfig) –

  Configuration for the output

• model_path (str) –

  Path to pytorch .pt model file

• report (bool, default: True ) –

  Whether to generate the report of the predictions

• gradcam (bool, default: False ) –

  Whether to compute gradcams

• device (Optional[str], default: None ) –

  Device to use for evaluation. If None, the device is automatically determined

Source code in quadra/tasks/classification.py

def __init__(
    self,
    config: DictConfig,
    output: DictConfig,
    model_path: str,
    report: bool = True,
    gradcam: bool = False,
    device: Optional[str] = None,
):
    super().__init__(config=config, model_path=model_path, device=device)
    self.report_path = "test_output"
    self.output = output
    self.report = report
    self.gradcam = gradcam
    self.cam: GradCAM

deployment_model: BaseEvaluationModel property writable

Deployment model.

execute()

Execute the evaluation.

Source code in quadra/tasks/classification.py

def execute(self) -> None:
    """Execute the evaluation."""
    self.prepare()
    self.test()
    if self.report:
        self.generate_report()
    self.finalize()

generate_report()

Generate a report for the task.

Source code in quadra/tasks/classification.py

def generate_report(self) -> None:
    """Generate a report for the task."""
    log.info("Generating report!")
    os.makedirs(self.report_path, exist_ok=True)

    save_classification_result(
        results=self.metadata["test_results"],
        output_folder=self.report_path,
        confmat=self.metadata["test_confusion_matrix"],
        accuracy=self.metadata["test_accuracy"],
        test_dataloader=self.datamodule.test_dataloader(),
        config=self.config,
        output=self.output,
        grayscale_cams=self.metadata["grayscale_cams"],
    )

get_classifier(model_config)

Instantiate the classifier from the config.

Source code in quadra/tasks/classification.py

def get_classifier(self, model_config: DictConfig) -> nn.Module:
    """Instantiate the classifier from the config."""
    if "classifier" in model_config:
        log.info("Instantiating classifier <%s>", model_config.classifier["_target_"])
        return hydra.utils.instantiate(
            model_config.classifier, out_features=self.datamodule.num_classes, _convert_="partial"
        )

    raise ValueError("A `classifier` definition must be specified in the config")

get_pre_classifier(model_config)

Instantiate the pre-classifier from the config.

Source code in quadra/tasks/classification.py

def get_pre_classifier(self, model_config: DictConfig) -> nn.Module:
    """Instantiate the pre-classifier from the config."""
    if "pre_classifier" in model_config and model_config.pre_classifier is not None:
        log.info("Instantiating pre_classifier <%s>", model_config.pre_classifier["_target_"])
        pre_classifier = hydra.utils.instantiate(model_config.pre_classifier, _convert_="partial")
    else:
        log.info("No pre-classifier found in config: instantiate a torch.nn.Identity instead")
        pre_classifier = nn.Identity()

    return pre_classifier

get_torch_model(model_config)

Instantiate the torch model from the config.

Source code in quadra/tasks/classification.py

def get_torch_model(self, model_config: DictConfig) -> nn.Module:
    """Instantiate the torch model from the config."""
    pre_classifier = self.get_pre_classifier(model_config)
    classifier = self.get_classifier(model_config)
    log.info("Instantiating backbone <%s>", model_config.model["_target_"])

    return hydra.utils.instantiate(
        model_config.model, classifier=classifier, pre_classifier=pre_classifier, _convert_="partial"
    )

prepare()

Prepare the evaluation.

Source code in quadra/tasks/classification.py

def prepare(self) -> None:
    """Prepare the evaluation."""
    self.datamodule = self.config.datamodule
    super().prepare()

prepare_gradcam()

Initializing gradcam for the predictions.

Source code in quadra/tasks/classification.py

def prepare_gradcam(self) -> None:
    """Initializing gradcam for the predictions."""
    if not hasattr(self.deployment_model.model, "features_extractor"):
        log.warning("Gradcam not implemented for this backbone, it will not be computed")
        self.gradcam = False
        return

    if isinstance(self.deployment_model.model.features_extractor, timm.models.resnet.ResNet):
        target_layers = [
            cast(BaseNetworkBuilder, self.deployment_model.model).features_extractor.layer4[
                -1
            ]  # type: ignore[index]
        ]
        self.cam = GradCAM(
            model=self.deployment_model.model,
            target_layers=target_layers,
            use_cuda=(self.device != "cpu"),
        )
        for p in self.deployment_model.model.features_extractor.layer4[-1].parameters():
            p.requires_grad = True
    elif is_vision_transformer(cast(BaseNetworkBuilder, self.deployment_model.model).features_extractor):
        self.grad_rollout = VitAttentionGradRollout(cast(nn.Module, self.deployment_model.model))
    else:
        log.warning("Gradcam not implemented for this backbone, it will not be computed")
        self.gradcam = False

test()

Perform test.

Source code in quadra/tasks/classification.py

def test(self) -> None:
    """Perform test."""
    log.info("Running test")
    # prepare_data() must be explicitly called because there is no training
    self.datamodule.prepare_data()
    self.datamodule.setup(stage="test")
    test_dataloader = self.datamodule.test_dataloader()

    image_labels = []
    probabilities = []
    predicted_classes = []
    grayscale_cams_list = []

    if self.gradcam:
        self.prepare_gradcam()

    with torch.set_grad_enabled(self.gradcam):
        for batch_item in tqdm(test_dataloader):
            im, target = batch_item
            im = im.to(self.device).detach()

            if self.gradcam:
                # When gradcam is used we need to remove gradients
                outputs = self.deployment_model(im).detach()
            else:
                outputs = self.deployment_model(im)

            probs = torch.softmax(outputs, dim=1)
            preds = torch.max(probs, dim=1).indices

            probabilities.append(probs.tolist())
            predicted_classes.append(preds.tolist())
            image_labels.extend(target.tolist())
            if self.gradcam and hasattr(self.deployment_model.model, "features_extractor"):
                with torch.inference_mode(False):
                    im = im.clone()
                    if isinstance(self.deployment_model.model.features_extractor, timm.models.resnet.ResNet):
                        grayscale_cam = self.cam(input_tensor=im, targets=None)
                        grayscale_cams_list.append(torch.from_numpy(grayscale_cam))
                    elif is_vision_transformer(
                        cast(BaseNetworkBuilder, self.deployment_model.model).features_extractor
                    ):
                        grayscale_cam_low_res = self.grad_rollout(input_tensor=im, targets_list=preds.tolist())
                        orig_shape = grayscale_cam_low_res.shape
                        new_shape = (orig_shape[0], im.shape[2], im.shape[3])
                        zoom_factors = tuple(np.array(new_shape) / np.array(orig_shape))
                        grayscale_cam = ndimage.zoom(grayscale_cam_low_res, zoom_factors, order=1)
                        grayscale_cams_list.append(torch.from_numpy(grayscale_cam))

    grayscale_cams: Optional[torch.Tensor] = None
    if self.gradcam:
        grayscale_cams = torch.cat(grayscale_cams_list, dim=0)

    predicted_classes = [item for sublist in predicted_classes for item in sublist]
    probabilities = [max(item) for sublist in probabilities for item in sublist]
    if self.datamodule.class_to_idx is not None:
        idx_to_class = {v: k for k, v in self.datamodule.class_to_idx.items()}

    _, pd_cm, test_accuracy = get_results(
        test_labels=image_labels,
        pred_labels=predicted_classes,
        idx_to_labels=idx_to_class,
    )

    res = pd.DataFrame(
        {
            "sample": list(test_dataloader.dataset.x),  # type: ignore[attr-defined]
            "real_label": image_labels,
            "pred_label": predicted_classes,
            "probability": probabilities,
        }
    )

    log.info("Avg classification accuracy: %s", test_accuracy)

    self.res = pd.DataFrame(
        {
            "sample": list(test_dataloader.dataset.x),  # type: ignore[attr-defined]
            "real_label": image_labels,
            "pred_label": predicted_classes,
            "probability": probabilities,
        }
    )

    # save results
    self.metadata["test_confusion_matrix"] = pd_cm
    self.metadata["test_accuracy"] = test_accuracy
    self.metadata["predictions"] = predicted_classes
    self.metadata["test_results"] = res
    self.metadata["probabilities"] = probabilities
    self.metadata["test_labels"] = image_labels
    self.metadata["grayscale_cams"] = grayscale_cams

SklearnClassification(config, output, device)

Bases: Generic[SklearnClassificationDataModuleT], Task[SklearnClassificationDataModuleT]

Sklearn classification task.

Parameters:

• config (DictConfig) –

  The experiment configuration

• device (str) –

  The device to use. Defaults to None.

• output (DictConfig) –

  Dictionary defining which kind of outputs to generate. Defaults to None.

Source code in quadra/tasks/classification.py

def __init__(
    self,
    config: DictConfig,
    output: DictConfig,
    device: str,
):
    super().__init__(config=config)

    self._device = device
    self.output = output
    self._backbone: ModelSignatureWrapper
    self._trainer: SklearnClassificationTrainer
    self._model: ClassifierMixin
    self.metadata: Dict[str, Any] = {
        "test_confusion_matrix": [],
        "test_accuracy": [],
        "test_results": [],
        "test_labels": [],
    }
    self.export_folder = "deployment_model"
    self.deploy_info_file = "model.json"
    self.train_dataloader_list: List[torch.utils.data.DataLoader] = []
    self.test_dataloader_list: List[torch.utils.data.DataLoader] = []

backbone: ModelSignatureWrapper property writable

model: ClassifierMixin property writable

sklearn.base.ClassifierMixin: The model.

trainer: SklearnClassificationTrainer property writable

execute()

Execute the experiment and all the steps.

Source code in quadra/tasks/classification.py

def execute(self) -> None:
    """Execute the experiment and all the steps."""
    self.prepare()
    self.train()
    if self.output.report:
        self.generate_report()
    self.train_full_data()
    if self.config.export is not None and len(self.config.export.types) > 0:
        self.export()
    if self.output.test_full_data:
        self.test_full_data()
    self.finalize()

export()

Generate deployment model for the task.

Source code in quadra/tasks/classification.py

def export(self) -> None:
    """Generate deployment model for the task."""
    if self.config.export is None or len(self.config.export.types) == 0:
        log.info("No export type specified skipping export")
        return

    input_shapes = self.config.export.input_shapes

    idx_to_class = {v: k for k, v in self.datamodule.full_dataset.class_to_idx.items()}

    model_json, export_paths = export_model(
        config=self.config,
        model=self.backbone,
        export_folder=self.export_folder,
        half_precision=False,
        input_shapes=input_shapes,
        idx_to_class=idx_to_class,
        pytorch_model_type="backbone",
    )

    dump(self.model, os.path.join(self.export_folder, "classifier.joblib"))

    if len(export_paths) > 0:
        with open(os.path.join(self.export_folder, self.deploy_info_file), "w") as f:
            json.dump(model_json, f)

generate_report()

Generate report for the task.

Source code in quadra/tasks/classification.py

def generate_report(self) -> None:
    """Generate report for the task."""
    log.info("Generating report!")

    cm_list = []

    for count in range(len(self.metadata["test_accuracy"])):
        current_output_folder = f"{self.output.folder}_{count}"
        os.makedirs(current_output_folder, exist_ok=True)

        c_matrix = self.metadata["test_confusion_matrix"][count]
        cm_list.append(c_matrix)
        save_classification_result(
            results=self.metadata["test_results"][count],
            output_folder=current_output_folder,
            confmat=c_matrix,
            accuracy=self.metadata["test_accuracy"][count],
            test_dataloader=self.test_dataloader_list[count],
            config=self.config,
            output=self.output,
        )
    final_confusion_matrix = sum(cm_list)

    self.metadata["final_confusion_matrix"] = final_confusion_matrix
    # Save final conf matrix
    final_folder = f"{self.output.folder}"
    os.makedirs(final_folder, exist_ok=True)
    disp = ConfusionMatrixDisplay(
        confusion_matrix=np.array(final_confusion_matrix),
        display_labels=[x.replace("pred:", "") for x in final_confusion_matrix.columns.to_list()],
    )
    disp.plot(include_values=True, cmap=plt.cm.Greens, ax=None, colorbar=False, xticks_rotation=90)
    plt.title(f"Confusion Matrix (Accuracy: {(self.metadata['test_accuracy'][count] * 100):.2f}%)")
    plt.savefig(os.path.join(final_folder, "test_confusion_matrix.png"), bbox_inches="tight", pad_inches=0, dpi=300)
    plt.close()

prepare()

Prepare the experiment.

Source code in quadra/tasks/classification.py

def prepare(self) -> None:
    """Prepare the experiment."""
    self.datamodule = self.config.datamodule

    self.backbone = self.config.backbone

    self.model = self.config.model
    # prepare_data() must be explicitly called if the task does not include a lightining training
    self.datamodule.prepare_data()
    self.datamodule.setup(stage="fit")

    self.train_dataloader_list = list(self.datamodule.train_dataloader())
    self.test_dataloader_list = list(self.datamodule.val_dataloader())
    self.trainer = self.config.trainer

test()

Skip test phase.

Source code in quadra/tasks/classification.py

def test(self) -> None:
    """Skip test phase."""

test_full_data()

Test model trained on full dataset.

Source code in quadra/tasks/classification.py

@typing.no_type_check
def test_full_data(self) -> None:
    """Test model trained on full dataset."""
    self.config.datamodule.class_to_idx = self.datamodule.full_dataset.class_to_idx
    self.config.datamodule.phase = "test"
    idx_to_class = self.datamodule.full_dataset.idx_to_class
    self.datamodule.setup("test")
    test_dataloader = self.datamodule.test_dataloader()

    if len(self.datamodule.data["samples"]) == 0:
        log.info("No test data, skipping test")
        return

    _, pd_cm, accuracy, res, _ = self.trainer.test(
        test_dataloader=test_dataloader, idx_to_class=idx_to_class, predict_proba=True
    )

    output_folder_test = "test"

    os.makedirs(output_folder_test, exist_ok=True)

    save_classification_result(
        results=res,
        output_folder=output_folder_test,
        confmat=pd_cm,
        accuracy=accuracy,
        test_dataloader=test_dataloader,
        config=self.config,
        output=self.output,
    )

train()

Train the model.

Source code in quadra/tasks/classification.py

@typing.no_type_check
def train(self) -> None:
    """Train the model."""
    log.info("Starting training...!")
    all_features = None
    all_labels = None

    class_to_keep = None

    if hasattr(self.datamodule, "class_to_keep_training") and self.datamodule.class_to_keep_training is not None:
        class_to_keep = self.datamodule.class_to_keep_training

    if hasattr(self.datamodule, "cache") and self.datamodule.cache:
        if self.config.trainer.iteration_over_training != 1:
            raise AttributeError("Cache is only supported when iteration over training is set to 1")

        full_dataloader = self.datamodule.full_dataloader()
        all_features, all_labels, _ = get_feature(
            feature_extractor=self.backbone, dl=full_dataloader, iteration_over_training=1
        )

        sorted_indices = np.argsort(full_dataloader.dataset.x)
        all_features = all_features[sorted_indices]
        all_labels = all_labels[sorted_indices]

    # cycle over all train/test split
    for train_dataloader, test_dataloader in zip(self.train_dataloader_list, self.test_dataloader_list):
        # Reinit classifier
        self.model = self.config.model
        self.trainer.change_classifier(self.model)

        # Train on current training set
        if all_features is not None and all_labels is not None:
            # Find which are the indices used to pass from the sorted list of string to the disordered one
            sorted_indices = np.argsort(np.concatenate([train_dataloader.dataset.x, test_dataloader.dataset.x]))
            revese_sorted_indices = np.argsort(sorted_indices)

            # Use these indices to correctly match the extracted features with the new file order
            all_features_sorted = all_features[revese_sorted_indices]
            all_labels_sorted = all_labels[revese_sorted_indices]

            train_len = len(train_dataloader.dataset.x)

            self.trainer.fit(
                train_features=all_features_sorted[0:train_len], train_labels=all_labels_sorted[0:train_len]
            )

            _, pd_cm, accuracy, res, _ = self.trainer.test(
                test_dataloader=test_dataloader,
                test_features=all_features_sorted[train_len:],
                test_labels=all_labels_sorted[train_len:],
                class_to_keep=class_to_keep,
                idx_to_class=train_dataloader.dataset.idx_to_class,
                predict_proba=True,
            )
        else:
            self.trainer.fit(train_dataloader=train_dataloader)
            _, pd_cm, accuracy, res, _ = self.trainer.test(
                test_dataloader=test_dataloader,
                class_to_keep=class_to_keep,
                idx_to_class=train_dataloader.dataset.idx_to_class,
                predict_proba=True,
            )

        # save results
        self.metadata["test_confusion_matrix"].append(pd_cm)
        self.metadata["test_accuracy"].append(accuracy)
        self.metadata["test_results"].append(res)
        self.metadata["test_labels"].append(
            [
                train_dataloader.dataset.idx_to_class[i] if i != -1 else "N/A"
                for i in res["real_label"].unique().tolist()
            ]
        )

train_full_data()

Train the model on train + validation.

Source code in quadra/tasks/classification.py

def train_full_data(self):
    """Train the model on train + validation."""
    # Reinit classifier
    self.model = self.config.model
    self.trainer.change_classifier(self.model)

    self.trainer.fit(train_dataloader=self.datamodule.full_dataloader())

SklearnTestClassification(config, output, model_path, device, gradcam=False, **kwargs)

Bases: Evaluation[SklearnClassificationDataModuleT]

Perform a test using an imported SklearnClassification pytorch model.

Parameters:

• config (DictConfig) –

  The experiment configuration

• output (DictConfig) –

  where to save results

• model_path (str) –

  path to trained model generated from SklearnClassification task.

• device (str) –

  the device where to run the model (cuda or cpu)

• gradcam (bool, default: False ) –

  Whether to compute gradcams

• **kwargs (Any, default: {} ) –

  Additional arguments to pass to the task

Source code in quadra/tasks/classification.py

def __init__(
    self,  # pylint: disable=W0613
    config: DictConfig,
    output: DictConfig,
    model_path: str,
    device: str,
    gradcam: bool = False,
    **kwargs: Any,
):
    super().__init__(config=config, model_path=model_path, device=device, **kwargs)
    self.gradcam = gradcam
    self.output = output
    self._backbone: BaseEvaluationModel
    self._classifier: ClassifierMixin
    self.class_to_idx: Dict[str, int]
    self.idx_to_class: Dict[int, str]
    self.test_dataloader: torch.utils.data.DataLoader
    self.metadata: Dict[str, Any] = {
        "test_confusion_matrix": None,
        "test_accuracy": None,
        "test_results": None,
        "test_labels": None,
        "cams": None,
    }

backbone: BaseEvaluationModel property writable

classifier: ClassifierMixin property writable

deployment_model property writable

Deployment model.

trainer: SklearnClassificationTrainer property writable

execute()

Execute the experiment and all the steps.

Source code in quadra/tasks/classification.py

def execute(self) -> None:
    """Execute the experiment and all the steps."""
    self.prepare()
    self.test()
    if self.output.report:
        self.generate_report()
    self.finalize()

generate_report()

Generate a report for the task.

Source code in quadra/tasks/classification.py

def generate_report(self) -> None:
    """Generate a report for the task."""
    log.info("Generating report!")
    os.makedirs(self.output.folder, exist_ok=True)
    save_classification_result(
        results=self.metadata["test_results"],
        output_folder=self.output.folder,
        confmat=self.metadata["test_confusion_matrix"],
        accuracy=self.metadata["test_accuracy"],
        test_dataloader=self.test_dataloader,
        config=self.config,
        output=self.output,
        grayscale_cams=self.metadata["cams"],
    )

prepare()

Prepare the experiment.

Source code in quadra/tasks/classification.py

def prepare(self) -> None:
    """Prepare the experiment."""
    super().prepare()

    idx_to_class = {}
    class_to_idx = {}
    for k, v in self.model_data["classes"].items():
        idx_to_class[int(k)] = v
        class_to_idx[v] = int(k)

    self.idx_to_class = idx_to_class
    self.class_to_idx = class_to_idx

    self.config.datamodule.class_to_idx = class_to_idx

    self.datamodule = self.config.datamodule
    # prepare_data() must be explicitly called because there is no lightning training
    self.datamodule.prepare_data()
    self.datamodule.setup(stage="test")

    self.test_dataloader = self.datamodule.test_dataloader()

    # Configure trainer
    self.trainer = self.config.trainer

test()

Run the test.

Source code in quadra/tasks/classification.py

def test(self) -> None:
    """Run the test."""
    _, pd_cm, accuracy, res, cams = self.trainer.test(
        test_dataloader=self.test_dataloader,
        idx_to_class=self.idx_to_class,
        predict_proba=True,
        gradcam=self.gradcam,
    )

    # save results
    self.metadata["test_confusion_matrix"] = pd_cm
    self.metadata["test_accuracy"] = accuracy
    self.metadata["test_results"] = res
    self.metadata["test_labels"] = [
        self.idx_to_class[i] if i != -1 else "N/A" for i in res["real_label"].unique().tolist()
    ]
    self.metadata["cams"] = cams