contrib.rnn.PhasedLSTMCell

tf.contrib.rnn.PhasedLSTMCell

class tf.contrib.rnn.PhasedLSTMCell

Defined in tensorflow/contrib/rnn/python/ops/rnn_cell.py.

Phased LSTM recurrent network cell.

https://arxiv.org/pdf/1610.09513v1.pdf

Properties

graph

losses

non_trainable_variables

non_trainable_weights

output_size

scope_name

state_size

trainable_variables

trainable_weights

updates

variables

Returns the list of all layer variables/weights.

Returns:

A list of variables.

weights

Returns the list of all layer variables/weights.

Returns:

A list of variables.

Methods

__init__

__init__(
    num_units,
    use_peepholes=False,
    leak=0.001,
    ratio_on=0.1,
    trainable_ratio_on=True,
    period_init_min=1.0,
    period_init_max=1000.0,
    reuse=None
)

Initialize the Phased LSTM cell.

Args:

• num_units: int, The number of units in the Phased LSTM cell.
• use_peepholes: bool, set True to enable peephole connections.
• leak: float or scalar float Tensor with value in [0, 1]. Leak applied during training.
• ratio_on: float or scalar float Tensor with value in [0, 1]. Ratio of the period during which the gates are open.
• trainable_ratio_on: bool, weather ratio_on is trainable.
• period_init_min: float or scalar float Tensor. With value > 0. Minimum value of the initalized period. The period values are initialized by drawing from the distribution: e^U(log(period_init_min), log(period_init_max)) Where U(.,.) is the uniform distribution.
• period_init_max: float or scalar float Tensor. With value > period_init_min. Maximum value of the initalized period.
• reuse: (optional) Python boolean describing whether to reuse variables in an existing scope. If not True, and the existing scope already has the given variables, an error is raised.

__call__

__call__(
    inputs,
    state,
    scope=None
)

Run this RNN cell on inputs, starting from the given state.

Args:

• inputs: 2-D tensor with shape [batch_size x input_size].
• state: if self.state_size is an integer, this should be a 2-D Tensor with shape [batch_size x self.state_size]. Otherwise, if self.state_size is a tuple of integers, this should be a tuple with shapes [batch_size x s] for s in self.state_size.
• scope: VariableScope for the created subgraph; defaults to class name.

Returns:

A pair containing:

• Output: A 2-D tensor with shape [batch_size x self.output_size].
• New state: Either a single 2-D tensor, or a tuple of tensors matching the arity and shapes of state.

__deepcopy__

__deepcopy__(memo)

add_loss

add_loss(
    losses,
    inputs=None
)

Add loss tensor(s), potentially dependent on layer inputs.

Some losses (for instance, activity regularization losses) may be dependent on the inputs passed when calling a layer. Hence, when reusing a same layer on different inputs a and b, some entries in layer.losses may be dependent on a and some on b. This method automatically keeps track of dependencies.

The get_losses_for method allows to retrieve the losses relevant to a specific set of inputs.

Arguments:

• losses: Loss tensor, or list/tuple of tensors.
• inputs: Optional input tensor(s) that the loss(es) depend on. Must match the inputs argument passed to the __call__ method at the time the losses are created. If None is passed, the losses are assumed to be unconditional, and will apply across all dataflows of the layer (e.g. weight regularization losses).

add_update

add_update(
    updates,
    inputs=None
)

Add update op(s), potentially dependent on layer inputs.

Weight updates (for instance, the updates of the moving mean and variance in a BatchNormalization layer) may be dependent on the inputs passed when calling a layer. Hence, when reusing a same layer on different inputs a and b, some entries in layer.updates may be dependent on a and some on b. This method automatically keeps track of dependencies.

The get_updates_for method allows to retrieve the updates relevant to a specific set of inputs.

Arguments:

• updates: Update op, or list/tuple of update ops.
• inputs: Optional input tensor(s) that the update(s) depend on. Must match the inputs argument passed to the __call__ method at the time the updates are created. If None is passed, the updates are assumed to be unconditional, and will apply across all dataflows of the layer.

add_variable

add_variable(
    name,
    shape,
    dtype=None,
    initializer=None,
    regularizer=None,
    trainable=True
)

Adds a new variable to the layer, or gets an existing one; returns it.

Arguments:

• name: variable name.
• shape: variable shape.
• dtype: The type of the variable. Defaults to self.dtype.
• initializer: initializer instance (callable).
• regularizer: regularizer instance (callable).
• trainable: whether the variable should be part of the layer's "trainable_variables" (e.g. variables, biases) or "non_trainable_variables" (e.g. BatchNorm mean, stddev).

Returns:

The created variable.

apply

apply(
    inputs,
    *args,
    **kwargs
)

Apply the layer on a input.

This simply wraps self.__call__.

Arguments:

• inputs: Input tensor(s). args: additional positional arguments to be passed to self.call.
  *kwargs: additional keyword arguments to be passed to self.call.

Returns:

Output tensor(s).

build

build(_)

call

call(
    inputs,
    state
)

Phased LSTM Cell.

Args:

• inputs: A tuple of 2 Tensor. The first Tensor has shape [batch, 1], and type float32 or float64. It stores the time. The second Tensor has shape [batch, features_size], and type float32. It stores the features.
• state: rnn_cell_impl.LSTMStateTuple, state from previous timestep.

Returns:

A tuple containing: - A Tensor of float32, and shape [batch_size, num_units], representing the output of the cell. - A rnn_cell_impl.LSTMStateTuple, containing 2 Tensors of float32, shape [batch_size, num_units], representing the new state and the output.

get_losses_for

get_losses_for(inputs)

Retrieves losses relevant to a specific set of inputs.

Arguments:

• inputs: Input tensor or list/tuple of input tensors. Must match the inputs argument passed to the __call__ method at the time the losses were created. If you pass inputs=None, unconditional losses are returned, such as weight regularization losses.

Returns:

List of loss tensors of the layer that depend on inputs.

get_updates_for

get_updates_for(inputs)

Retrieves updates relevant to a specific set of inputs.

Arguments:

• inputs: Input tensor or list/tuple of input tensors. Must match the inputs argument passed to the __call__ method at the time the updates were created. If you pass inputs=None, unconditional updates are returned.

Returns:

List of update ops of the layer that depend on inputs.

zero_state

zero_state(
    batch_size,
    dtype
)

Return zero-filled state tensor(s).

Args:

• batch_size: int, float, or unit Tensor representing the batch size.
• dtype: the data type to use for the state.

Returns:

If state_size is an int or TensorShape, then the return value is a N-D tensor of shape [batch_size x state_size] filled with zeros.

If state_size is a nested list or tuple, then the return value is a nested list or tuple (of the same structure) of 2-D tensors with the shapes [batch_size x s] for each s in state_size.