elliot.recommender.gan.CFGAN package¶
Submodules¶
elliot.recommender.gan.CFGAN.cfgan module¶
Module description:
-
class
elliot.recommender.gan.CFGAN.cfgan.
CFGAN
(data, config, params, *args, **kwargs)[source]¶ Bases:
elliot.recommender.recommender_utils_mixin.RecMixin
,elliot.recommender.base_recommender_model.BaseRecommenderModel
CFGAN: A Generic Collaborative Filtering Framework based on Generative Adversarial Networks
For further details, please refer to the paper
- Parameters
factors – Number of latent factor
lr – Learning rate
l_w – Regularization coefficient
l_b – Regularization coefficient of bias
l_gan – Adversarial regularization coefficient
g_epochs – Number of epochs to train the generator for each IRGAN step
d_epochs – Number of epochs to train the discriminator for each IRGAN step
s_zr – Sampling parameter of zero-reconstruction
s_pm – Sampling parameter of partial-masking
To include the recommendation model, add it to the config file adopting the following pattern:
models: CFGAN: meta: save_recs: True epochs: 10 batch_size: 512 factors: 10 lr: 0.001 l_w: 0.1 l_b: 0.001 l_gan: 0.001 g_epochs: 5 d_epochs: 1 s_zr: 0.001 s_pm: 0.001
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property
name
¶
elliot.recommender.gan.CFGAN.cfgan_model module¶
Module description:
-
class
elliot.recommender.gan.CFGAN.cfgan_model.
CFGAN_model
(*args, **kwargs)[source]¶ Bases:
tensorflow.python.keras.engine.training.Model
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get_config
()[source]¶ Returns the config of the layer.
A layer config is a Python dictionary (serializable) containing the configuration of a layer. The same layer can be reinstantiated later (without its trained weights) from this configuration.
The config of a layer does not include connectivity information, nor the layer class name. These are handled by Network (one layer of abstraction above).
- Returns
Python dictionary.
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predict
(start, stop, **kwargs)[source]¶ Generates output predictions for the input samples.
Computation is done in batches. This method is designed for performance in large scale inputs. For small amount of inputs that fit in one batch, directly using __call__ is recommended for faster execution, e.g., model(x), or model(x, training=False) if you have layers such as tf.keras.layers.BatchNormalization that behaves differently during inference. Also, note the fact that test loss is not affected by regularization layers like noise and dropout.
- Parameters
x –
Input samples. It could be: - A Numpy array (or array-like), or a list of arrays
(in case the model has multiple inputs).
A TensorFlow tensor, or a list of tensors (in case the model has multiple inputs).
A tf.data dataset.
A generator or keras.utils.Sequence instance.
A more detailed description of unpacking behavior for iterator types (Dataset, generator, Sequence) is given in the Unpacking behavior for iterator-like inputs section of Model.fit.
batch_size – Integer or None. Number of samples per batch. If unspecified, batch_size will default to 32. Do not specify the batch_size if your data is in the form of dataset, generators, or keras.utils.Sequence instances (since they generate batches).
verbose – Verbosity mode, 0 or 1.
steps – Total number of steps (batches of samples) before declaring the prediction round finished. Ignored with the default value of None. If x is a tf.data dataset and steps is None, predict will run until the input dataset is exhausted.
callbacks – List of keras.callbacks.Callback instances. List of callbacks to apply during prediction. See [callbacks](/api_docs/python/tf/keras/callbacks).
max_queue_size – Integer. Used for generator or keras.utils.Sequence input only. Maximum size for the generator queue. If unspecified, max_queue_size will default to 10.
workers – Integer. Used for generator or keras.utils.Sequence input only. Maximum number of processes to spin up when using process-based threading. If unspecified, workers will default to 1. If 0, will execute the generator on the main thread.
use_multiprocessing – Boolean. Used for generator or keras.utils.Sequence input only. If True, use process-based threading. If unspecified, use_multiprocessing will default to False. Note that because this implementation relies on multiprocessing, you should not pass non-picklable arguments to the generator as they can’t be passed easily to children processes.
See the discussion of Unpacking behavior for iterator-like inputs for Model.fit. Note that Model.predict uses the same interpretation rules as Model.fit and Model.evaluate, so inputs must be unambiguous for all three methods.
- Returns
Numpy array(s) of predictions.
- Raises
RuntimeError – If model.predict is wrapped in tf.function.
ValueError – In case of mismatch between the provided input data and the model’s expectations, or in case a stateful model receives a number of samples that is not a multiple of the batch size.
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train_step
(batch)[source]¶ The logic for one training step.
This method can be overridden to support custom training logic. This method is called by Model.make_train_function.
This method should contain the mathemetical logic for one step of training. This typically includes the forward pass, loss calculation, backpropagation, and metric updates.
Configuration details for how this logic is run (e.g. tf.function and tf.distribute.Strategy settings), should be left to Model.make_train_function, which can also be overridden.
- Parameters
data – A nested structure of `Tensor`s.
- Returns
A dict containing values that will be passed to tf.keras.callbacks.CallbackList.on_train_batch_end. Typically, the values of the Model’s metrics are returned. Example: {‘loss’: 0.2, ‘accuracy’: 0.7}.
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class
elliot.recommender.gan.CFGAN.cfgan_model.
Discriminator
(*args, **kwargs)[source]¶ Bases:
tensorflow.python.keras.engine.training.Model
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train_step
(batch)[source]¶ The logic for one training step.
This method can be overridden to support custom training logic. This method is called by Model.make_train_function.
This method should contain the mathemetical logic for one step of training. This typically includes the forward pass, loss calculation, backpropagation, and metric updates.
Configuration details for how this logic is run (e.g. tf.function and tf.distribute.Strategy settings), should be left to Model.make_train_function, which can also be overridden.
- Parameters
data – A nested structure of `Tensor`s.
- Returns
A dict containing values that will be passed to tf.keras.callbacks.CallbackList.on_train_batch_end. Typically, the values of the Model’s metrics are returned. Example: {‘loss’: 0.2, ‘accuracy’: 0.7}.
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class
elliot.recommender.gan.CFGAN.cfgan_model.
Generator
(*args, **kwargs)[source]¶ Bases:
tensorflow.python.keras.engine.training.Model
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train_step
(batch)[source]¶ The logic for one training step.
This method can be overridden to support custom training logic. This method is called by Model.make_train_function.
This method should contain the mathemetical logic for one step of training. This typically includes the forward pass, loss calculation, backpropagation, and metric updates.
Configuration details for how this logic is run (e.g. tf.function and tf.distribute.Strategy settings), should be left to Model.make_train_function, which can also be overridden.
- Parameters
data – A nested structure of `Tensor`s.
- Returns
A dict containing values that will be passed to tf.keras.callbacks.CallbackList.on_train_batch_end. Typically, the values of the Model’s metrics are returned. Example: {‘loss’: 0.2, ‘accuracy’: 0.7}.
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