avalanche.training.CoPE

class avalanche.training.CoPE(model: torch.nn.modules.module.Module, optimizer: torch.optim.optimizer.Optimizer, criterion, mem_size: int = 200, n_classes: int = 10, p_size: int = 100, alpha: float = 0.99, T: float = 0.1, train_mb_size: int = 1, train_epochs: int = 1, eval_mb_size: typing.Optional[int] = None, device=None, plugins: typing.Optional[typing.List[avalanche.core.SupervisedPlugin]] = None, evaluator: avalanche.training.plugins.evaluation.EvaluationPlugin = <avalanche.training.plugins.evaluation.EvaluationPlugin object>, eval_every=-1, **base_kwargs)[source]

Continual Prototype Evolution strategy.

See CoPEPlugin for more details. This strategy does not use task identities during training.

__init__(model: torch.nn.modules.module.Module, optimizer: torch.optim.optimizer.Optimizer, criterion, mem_size: int = 200, n_classes: int = 10, p_size: int = 100, alpha: float = 0.99, T: float = 0.1, train_mb_size: int = 1, train_epochs: int = 1, eval_mb_size: typing.Optional[int] = None, device=None, plugins: typing.Optional[typing.List[avalanche.core.SupervisedPlugin]] = None, evaluator: avalanche.training.plugins.evaluation.EvaluationPlugin = <avalanche.training.plugins.evaluation.EvaluationPlugin object>, eval_every=-1, **base_kwargs)[source]

Init.

Parameters
  • model – The model.

  • optimizer – The optimizer to use.

  • criterion – Loss criterion to use. Standard overwritten by PPPloss (see CoPEPlugin).

  • mem_size – replay buffer size.

  • n_classes – total number of classes that will be encountered. This is used to output predictions for all classes, with zero probability for unseen classes.

  • p_size – The prototype size, which equals the feature size of the last layer.

  • alpha – The momentum for the exponentially moving average of the prototypes.

  • T – The softmax temperature, used as a concentration parameter.

  • train_mb_size – The train minibatch size. Defaults to 1.

  • train_epochs – The number of training epochs. Defaults to 1.

  • eval_mb_size – The eval minibatch size. Defaults to 1.

  • device – The device to use. Defaults to None (cpu).

  • plugins – Plugins to be added. Defaults to None.

  • evaluator – (optional) instance of EvaluationPlugin for logging and metric computations.

  • eval_every – the frequency of the calls to eval inside the training loop. -1 disables the evaluation. 0 means eval is called only at the end of the learning experience. Values >0 mean that eval is called every eval_every epochs and at the end of the learning experience.

  • base_kwargs – any additional BaseTemplate constructor arguments.

Methods

__init__(model, optimizer, criterion[, ...])

Init.

backward()

Run the backward pass.

criterion()

Loss function.

eval(exp_list, **kwargs)

Evaluate the current model on a series of experiences and returns the last recorded value for each metric.

eval_dataset_adaptation(**kwargs)

Initialize self.adapted_dataset.

eval_epoch(**kwargs)

Evaluation loop over the current self.dataloader.

forward()

Compute the model's output given the current mini-batch.

make_eval_dataloader([num_workers, ...])

Initializes the eval data loader. :param num_workers: How many subprocesses to use for data loading. 0 means that the data will be loaded in the main process. (default: 0). :param pin_memory: If True, the data loader will copy Tensors into CUDA pinned memory before returning them. Defaults to True. :param kwargs: :return:.

make_optimizer()

Optimizer initialization.

make_train_dataloader([num_workers, ...])

Data loader initialization.

model_adaptation([model])

Adapts the model to the current data.

optimizer_step()

Execute the optimizer step (weights update).

stop_training()

Signals to stop training at the next iteration.

train(experiences[, eval_streams])

Training loop.

train_dataset_adaptation(**kwargs)

Initialize self.adapted_dataset.

training_epoch(**kwargs)

Training epoch.

Attributes

is_eval

True if the strategy is in evaluation mode.

mb_task_id

Current mini-batch task labels.

mb_x

Current mini-batch input.

mb_y

Current mini-batch target.