# Layer Base Classes¶

## ITensor¶

tensorrt.TensorLocation

The physical location of the data.

Members:

HOST : Data is stored on the device.

DEVICE : Data is stored on the device.

class tensorrt.ITensor

A tensor in an INetworkDefinition .

Variables: name – str The tensor name. For a network input, the name is assigned by the application. For tensors which are layer outputs, a default name is assigned consisting of the layer name followed by the index of the output in brackets. shape – Dims The shape of a tensor. For a network input the shape is assigned by the application. For a network output it is computed based on the layer parameters and the inputs to the layer. If a tensor size or a parameter is modified in the network, the shape of all dependent tensors will be recomputed. This call is only legal for network input tensors, since the shape of layer output tensors are inferred based on layer inputs and parameters. dtype – DataType The data type of a tensor. The type is unchanged if the type is invalid for the given tensor. If the tensor is a network input or output, then the tensor type cannot be tensorrt.int8 . broadcast_across_batch – bool Whether to enable broadcast of tensor across the batch. When a tensor is broadcast across a batch, it has the same value for every member in the batch. Memory is only allocated once for the single member. This method is only valid for network input tensors, since the flags of layer output tensors are inferred based on layer inputs and parameters. If this state is modified for a tensor in the network, the states of all dependent tensors will be recomputed. location – TensorLocation The storage location of a tensor. is_network_input – bool Whether the tensor is a network input. is_network_output – bool Whether the tensor is a network output.
get_dynamic_range(self: tensorrt.tensorrt.ITensor) → float

Get dynamic range for the tensor.

Returns: absolute maxima of the dynamic range.
set_dynamic_range(self: tensorrt.tensorrt.ITensor, min: float, max: float) → bool

Set dynamic range for the tensor.

Parameters: min – Minima of the dynamic range. max – Maxima of the dyanmic range. true if succeed in setting range. Otherwise false.

## ILayer¶

tensorrt.LayerType

Type of Layer

Members:

UNARY : Unary layer

LRN : LRN layer

PLUGIN : Plugin layer

IDENTITY : Identity layer

ACTIVATION : Activation layer

FULLY_CONNECTED : Fully connected layer

ELEMENTWISE : Elementwise layer

TOPK : TopK layer

SOFTMAX : Softmax layer

GATHER : Gather layer

PLUGIN_V2 : PluginV2 layer

RNN : RNN layer

RNN_V2 : RNNv2 layer

CONSTANT : Constant layer

DECONVOLUTION : Deconvolution layer

MATRIX_MULTIPLY : Matrix multiply layer

CONVOLUTION : Convolution layer

SHUFFLE : Shuffle layer

RAGGED_SOFTMAX : Ragged softmax layer

REDUCE : Reduce layer

CONCATENATION : Concatenation layer

SCALE : Scale layer

POOLING : Pooling layer

class tensorrt.ILayer

Base class for all layer classes in an INetworkDefinition .

Variables: name – str The name of the layer. type – LayerType The type of the layer. num_inputs – int The number of inputs of the layer. num_outputs – int The number of outputs of the layer. precision – DataType The computation precision. precision_is_set – bool Whether the precision is set or not.
get_input(self: tensorrt.tensorrt.ILayer, index: int) → tensorrt.tensorrt.ITensor

Get the layer input corresponding to the given index.

Parameters: index – The index of the input tensor. The input tensor, or None if the index is out of range.
get_output(self: tensorrt.tensorrt.ILayer, index: int) → tensorrt.tensorrt.ITensor

Get the layer output corresponding to the given index.

Parameters: index – The index of the output tensor. The output tensor, or None if the index is out of range.
get_output_type(self: tensorrt.tensorrt.ILayer, index: int) → tensorrt.tensorrt.DataType

Get the output type of the layer.

Parameters: index – The index of the output tensor. The output precision. Default : DataType.FLOAT.
output_type_is_set(self: tensorrt.tensorrt.ILayer, index: int) → bool

Whether the output type has been set for this layer.

Parameters: index – The index of the output. Whether the output type has been explicitly set.
reset_output_type(self: tensorrt.tensorrt.ILayer, index: int) → None

Reset output type of this layer.

Parameters: index – The index of the output.
reset_precision(self: tensorrt.tensorrt.ILayer) → None

Reset the computation precision of the layer.

set_output_type(self: tensorrt.tensorrt.ILayer, index: int, dtype: tensorrt.tensorrt.DataType) → None

Constraint layer to generate output data with given type.

Parameters: index – The index of the output tensor to set the type. dtype – DataType of the output.