Class - KerasDataLoader

class openfl.federated.data.loader_keras.KerasDataLoader(batch_size, **kwargs)

Bases: DataLoader

A class used to represent a Federation Data Loader for Keras models.

batch_size

Size of batches used for all data loaders.

Type:

int

X_train

Training features.

Type:

np.array

y_train

Training labels.

Type:

np.array

X_valid

Validation features.

Type:

np.array

y_valid

Validation labels.

Type:

np.array

__init__(batch_size, **kwargs)

Initializes the KerasDataLoader object.

Parameters:

• batch_size (int) – The size of batches used for all data loaders.

• kwargs – Additional arguments to pass to the function.

Methods

__init__(batch_size, **kwargs)	Initializes the KerasDataLoader object.
get_feature_shape()	Returns the shape of an example feature array.
get_infer_loader()	Returns the data loader for inferencing data.
get_num_classes()	Returns the number of classes for classification tasks.
get_train_data_size()	Returns the total number of training samples.
get_train_loader([batch_size, num_batches])	Returns the data loader for the training data.
get_valid_data_size()	Returns the total number of validation samples.
get_valid_loader([batch_size])	Returns the data loader for the validation data.

get_feature_shape()

Returns the shape of an example feature array.

Child classes must implement this method and return the feature shape.

Returns:

The shape of an example feature array.

Return type:

list

Raises:

NotImplementedError – This method must be implemented by all derived classes.

get_infer_loader()

Returns the data loader for inferencing data.

Raises:

NotImplementedError – This method must be implemented by a child class.

get_num_classes()

Returns the number of classes for classification tasks.

Child classes must implement this method and return the number of classes.

Returns:

The number of classes.

Return type:

int

Raises:

NotImplementedError – This method must be implemented by all derived classes.

get_train_data_size()

Returns the total number of training samples.

Returns:

The total number of training samples.

Return type:

int

get_train_loader(batch_size=None, num_batches=None)

Returns the data loader for the training data.

Parameters:

• batch_size (int, optional) – The batch size for the data loader (default is None).

• num_batches (int, optional) – The number of batches for the data loader (default is None).

Returns:

The DataLoader object for the training data.

Return type:

DataLoader

get_valid_data_size()

Returns the total number of validation samples.

Returns:

The total number of validation samples.

Return type:

int

get_valid_loader(batch_size=None)

Returns the data loader for the validation data.

Parameters:

batch_size (int, optional) – The batch size for the data loader (default is None).

Returns:

The DataLoader object for the validation data.

Return type:

DataLoader