metarl.tf.embeddings.encoder module

Encoders in TensorFlow.

class Encoder(name)

Bases: metarl.np.embeddings.encoder.Encoder, metarl.tf.models.module.Module

Base class for encoders in TensorFlow.

clone(name)

Return a clone of the encoder.

It only copies the configuration of the primitive, not the parameters.

Parameters:name (str) – Name of the newly created encoder. It has to be different from source encoder if cloned under the same computational graph. Returns:Newly cloned encoder. Return type:metarl.tf.embeddings.encoder.Encoder

get_latent(input_value)

Get a sample of embedding for the given input.

Parameters:input_value (numpy.ndarray) – Tensor to encode. Returns:An embedding sampled from embedding distribution. dict: Embedding distribution information. Return type:numpy.ndarray

Note

It returns an embedding and a dict, with keys - mean (numpy.ndarray): Mean of the distribution. - log_std (numpy.ndarray): Log standard deviation of the

distribution.

get_latents(input_values)

Get samples of embedding for the given inputs.

Parameters:input_values (numpy.ndarray) – Tensors to encode. Returns:Embeddings sampled from embedding distribution. dict: Embedding distribution information. Return type:numpy.ndarray

Note

It returns an embedding and a dict, with keys - mean (list[numpy.ndarray]): Means of the distribution. - log_std (list[numpy.ndarray]): Log standard deviations of the

distribution.

class StochasticEncoder(name)

Bases: metarl.np.embeddings.encoder.StochasticEncoder, metarl.tf.models.module.StochasticModule

Base class for stochastic encoders in TensorFlow.

build(embedding_input, name=None)

Build encoder.

After buil, self.distribution is a Gaussian distribution conitioned on embedding_input.

Parameters:

• embedding_input (tf.Tensor) – Embedding input.
• name (str) – Name of the model, which is also the name scope.