attribench.distributed.metrics.Deletion

class attribench.distributed.metrics.Deletion(model_factory, attributions_dataset, batch_size, maskers, activation_fns, mode='morf', start=0.0, stop=1.0, num_steps=100, address='localhost', port='12355', devices=None)

Bases: Metric

Compute the Deletion metric for a given AttributionsDataset and model using multiple processes.

Deletion is computed by iteratively masking the top (Most Relevant First, or MoRF) or bottom (Least Relevant First, or LeRF) features of the input samples and computing the confidence of the model on the masked samples.

This results in a curve of confidence vs. number of features masked. The area under (or equivalently over) this curve is the Deletion metric.

start, stop, and num_steps are used to determine the range of features to mask. The range is determined by start and stop as a percentage of the total number of features. num_steps is the number of steps to take between start and stop.

The Deletion metric is computed for each masker in maskers and for each activation function in activation_fns. The number of processes is determined by the number of devices. If devices is None, then all available devices are used. Samples are distributed evenly across the processes.

Parameters:

model_factoryModelFactory

ModelFactory instance or callable that returns a model. Used to create a model for each subprocess.

attributions_datasetAttributionsDataset

Dataset containing the samples and attributions to compute Deletion on.

batch_sizeint

The batch size to use when computing the metric.

maskersDict[str, Masker]

Dictionary of maskers to use for computing the metric.

activation_fnsUnion[List[str], str]

List of activation functions to use for computing the metric. If a single string is given, it is converted to a single-element list.

modestr, optional

Mode to use for computing the metric. Either “morf” or “lerf”. Default: “morf”

startfloat, optional

Relative start of the range of features to mask. Must be between 0 and 1. Default: 0.0

stopfloat, optional

Relative end of the range of features to mask. Must be between 0 and 1. Default: 1.0

num_stepsint, optional

Number of steps to use for the range of features to mask. Default: 100

addressstr, optional

Address to use for the multiprocessing connection. Default: “localhost”

portstr, optional

Port to use for the multiprocessing connection. Default: “12355”

devicesOptional[Tuple], optional

Devices to use. If None, then all available devices are used. Default: None

Methods

run	Runs the metric computation and optionally saves the result.
save_result	Save the result to disk.

Attributes

result

run(result_path=None, progress=True)

Runs the metric computation and optionally saves the result. If no result path is given, the result will not be saved to disk. It can still be accessed via the result property.

Parameters:

result_pathstr, optional

Path to save the result to. If None, the result is not saved to disk.

progressbool, optional

Whether to show a progress bar. Defaults to True.

save_result(path, format='hdf5')

Save the result to disk.

Parameters:

pathstr

Path to save the result to.

formatstr, optional

Format to save the result in. If "hdf5", the result is saved as an HDF5 file. If "csv", the result is saved as a directory structure containing CSV files. Default: "hdf5".

Raises:

ValueError

If the result is None.