oneflow.nn

These are the basic building blocks for graphs:

Parameter

Containers

Module	Base class for all neural network modules.
Sequential	A sequential container.
ModuleList	Holds submodules in a list.
ModuleDict	Holds submodules in a dictionary.
ParameterList	Holds parameters in a list.
ParameterDict	Holds parameters in a dictionary.

nn.Module

add_module	Adds a child module to the current module.
apply	Applies fn recursively to every submodule (as returned by .children()) as well as self.
buffers	Returns an iterator over module buffers.
children	Returns an iterator over immediate children modules.
cpu	Moves all model parameters and buffers to the CPU.
cuda	Moves all model parameters and buffers to the GPU.
double	Casts all floating point parameters and buffers to double datatype.
train	Sets the module in training mode.
eval	Sets the module in evaluation mode.
extra_repr	Set the extra representation of the module
float	Casts all floating point parameters and buffers to float datatype.
forward
load_state_dict	Copies parameters and buffers from state_dict into this module and its descendants.
modules	Returns an iterator over all modules in the network.
named_buffers	Returns an iterator over module buffers, yielding both the name of the buffer as well as the buffer itself.
named_children	Returns an iterator over immediate children modules, yielding both the name of the module as well as the module itself.
named_modules	Returns an iterator over all modules in the network, yielding both the name of the module as well as the module itself.
named_parameters	Returns an iterator over module parameters, yielding both the name of the parameter as well as the parameter itself.
parameters	Returns an iterator over module parameters.
register_buffer	Adds a buffer to the module.
register_forward_hook	Registers a forward hook on the module.
register_forward_pre_hook	Registers a forward pre-hook on the module.
register_backward_hook	Registers a backward hook on the module.
register_full_backward_hook	Registers a backward hook on the module.
register_state_dict_pre_hook	These hooks will be called with arguments: self, prefix, and keep_vars before calling state_dict on self.
register_parameter	Adds a parameter to the module.
requires_grad_	Change if autograd should record operations on parameters in this module.
state_dict	Returns a dictionary containing a whole state of the module.
to	Moves and/or casts the parameters and buffers.
zero_grad	Sets gradients of all model parameters to zero.

Containers

Convolution Layers

nn.Conv1d	Applies a 1D convolution over an input signal composed of several input planes.
nn.Conv2d	Applies a 2D convolution over an input signal composed of several input planes.
nn.Conv3d	Applies a 3D convolution over an input signal composed of several input planes.
nn.ConvTranspose1d	Applies a 1D transposed convolution operator over an input image composed of several input planes.
nn.ConvTranspose2d	Applies a 2D transposed convolution operator over an input image composed of several input planes.
nn.ConvTranspose3d	Applies a 3D transposed convolution operator over an input image composed of several input planes.
nn.Unfold	The documentation is referenced from: https://pytorch.org/docs/1.10/generated/torch.nn.Unfold.html.
nn.Fold	The documentation is referenced from: https://pytorch.org/docs/1.10/generated/torch.nn.Fold.html.

Pooling Layers

nn.MaxPool1d	Applies a 1D max pooling over an input signal composed of several input planes.
nn.MaxPool2d	Applies a 2D max pooling over an input signal composed of several input planes.
nn.MaxPool3d	Applies a 3D max pooling over an input signal composed of several input planes.
nn.MaxUnpool1d	Computes a partial inverse of MaxPool1d.
nn.MaxUnpool2d	Computes a partial inverse of MaxPool2d.
nn.MaxUnpool3d	Computes a partial inverse of MaxPool3d.
nn.AdaptiveAvgPool1d	Applies a 1D adaptive average pooling over an input signal composed of several input planes.
nn.AdaptiveAvgPool2d	Applies a 2D adaptive average pooling over an input signal composed of several input planes.
nn.AdaptiveAvgPool3d	Applies a 3D adaptive average pooling over an input signal composed of several input planes.
nn.AdaptiveMaxPool1d	Applies a 1D adaptive max pooling over an input signal composed of several input planes.
nn.AdaptiveMaxPool2d	Applies a 2D adaptive max pooling over an input signal composed of several input planes.
nn.AdaptiveMaxPool3d	Applies a 3D adaptive max pooling over an input signal composed of several input planes.
nn.AvgPool1d	Applies a 1D average pooling over an input signal composed of several input planes.
nn.AvgPool2d	Performs the 2d-average pooling on the input.
nn.AvgPool3d	Applies a 3D average pooling over an input signal composed of several input planes.

Padding Layers

nn.ConstantPad1d	Pads the input tensor boundaries with a constant value.
nn.ConstantPad2d	This operator pads the input with constant value that user specifies.
nn.ConstantPad3d	Pads the input tensor boundaries with a constant value.
nn.ReflectionPad1d	This operator pads the input tensor using the reflection of the input boundary.
nn.ReflectionPad2d	This operator pads the input tensor using the reflection of the input boundary.
nn.ReplicationPad1d	Pads the input tensor using replication of the input boundary.
nn.ReplicationPad2d	Pads the input tensor using the replication of the input boundary.
nn.ZeroPad2d	Pads the input tensor boundaries with zero.

Non-linear Activations (weighted sum, nonlinearity)

nn.ELU	Applies the element-wise function
nn.Hardshrink	The Hardshrink activation.
nn.Hardsigmoid	Applies the element-wise function:
nn.Hardswish	Applies the hardswish function, element-wise, as described in the paper Searching for MobileNetV3.
nn.Hardtanh	Applies the HardTanh function element-wise
nn.LeakyReLU	Applies the element-wise function:
nn.LogSigmoid	Applies the element-wise function:
nn.PReLU	Applies the element-wise function:
nn.ReLU	Applies the rectified linear unit function element-wise:
nn.ReLU6	Applies the element-wise function:
nn.SELU	Applies the element-wise function:
nn.CELU	Applies the element-wise function:
nn.GELU	The documentation is referenced from: https://pytorch.org/docs/1.10/generated/torch.nn.GELU.html.
nn.QuickGELU	Applies GELU approximation that is fast but somewhat inaccurate.
nn.SiLU	SiLU(Swish) activation:
nn.Sigmoid	Applies the element-wise function:
nn.Mish	Applies the element-wise function:
nn.Softplus	Applies the element-wise function:
nn.Softshrink	The Softshrink activation.
nn.Softsign	The SoftSign activation.
nn.Tanh	This operator computes the hyperbolic tangent value of Tensor.
nn.Threshold	The Threshold Activation.
nn.GLU	The GLU activation.

Non-linear Activations (other)

nn.Softmax	Applies the Softmax function to an n-dimensional input Tensor rescaling them so that the elements of the n-dimensional output Tensor lie in the range [0,1] and sum to 1.
nn.LogSoftmax	Applies the LogSoftmax function to an n-dimensional input Tensor.

Normalization Layers

nn.BatchNorm1d	Applies Batch Normalization over a 2D or 3D input (a mini-batch of 1D inputs with optional additional channel dimension) as described in the paper Batch Normalization: Accelerating Deep Network Training by Reducing Internal Covariate Shift .
nn.BatchNorm2d	Applies Batch Normalization over a 4D input (a mini-batch of 2D inputs with additional channel dimension) as described in the paper Batch Normalization: Accelerating Deep Network Training by Reducing Internal Covariate Shift .
nn.BatchNorm3d	Applies Batch Normalization over a 5D input (a mini-batch of 3D inputs with additional channel dimension) as described in the paper Batch Normalization: Accelerating Deep Network Training by Reducing Internal Covariate Shift .
nn.SyncBatchNorm	Applies Batch Normalization over a N-Dimensional input (a mini-batch of [N-2]D inputs with additional channel dimension) as described in the paper Batch Normalization: Accelerating Deep Network Training by Reducing Internal Covariate Shift .
nn.FusedBatchNorm1d	Applies Fused Batch Normalization over a 2D or 3D input, the formula is:
nn.FusedBatchNorm2d	Applies Fused Batch Normalization over a 4D input, the formula is:
nn.FusedBatchNorm3d	Applies Fused Batch Normalization over a 5D input, the formula is:
nn.GroupNorm	Applies Group Normalization over a mini-batch of inputs as described in the paper Group Normalization
nn.InstanceNorm1d	Applies Instance Normalization over a 3D input (a mini-batch of 1D inputs with optional additional channel dimension) as described in the paper Instance Normalization: The Missing Ingredient for Fast Stylization.
nn.InstanceNorm2d	Applies Instance Normalization over a 4D input (a mini-batch of 2D inputs with additional channel dimension) as described in the paper Instance Normalization: The Missing Ingredient for Fast Stylization.
nn.InstanceNorm3d	Applies Instance Normalization over a 5D input (a mini-batch of 3D inputs with additional channel dimension) as described in the paper Instance Normalization: The Missing Ingredient for Fast Stylization.
nn.LayerNorm	Applies Layer Normalization over a mini-batch of inputs as described in the paper Layer Normalization
nn.RMSLayerNorm	Construct a layernorm module in the T5 style.
nn.RMSNorm	Applies Root Mean Square Layer Normalization over a mini-batch of inputs as described in the paper Root Mean Square Layer Normalization

Recurrent Layers

nn.RNN	Applies a multi-layer Elman RNN with tanhtanh or text{ReLU}ReLU non-linearity to an input sequence.
nn.LSTM	Applies a multi-layer long short-term memory (LSTM) RNN to an input sequence.
nn.GRU	Applies a multi-layer gated recurrent unit (GRU) RNN to an input sequence.
nn.RNNCell	An Elman RNN cell with tanh or ReLU non-linearity.
nn.LSTMCell	A long short-term memory (LSTM) cell.
nn.GRUCell	A gated recurrent unit (GRU) cell

Linear Layers

nn.Identity	A placeholder identity operator that is argument-insensitive.
nn.Linear	Applies a linear transformation to the incoming data: \(y = xA^T + b\)

Dropout Layers

nn.Dropout	During training, randomly zeroes some of the elements of the input tensor with probability p using samples from a Bernoulli distribution.
nn.Dropout1d	Randomly zero out entire channels (a channel is a 1D feature map, e.g., the \(j\)-th channel of the \(i\)-th sample in the batched input is a 1D tensor :math:` ext{input}[i, j]`).
nn.Dropout2d	Randomly zero out entire channels (a channel is a 2D feature map, e.g., the \(j\)-th channel of the \(i\)-th sample in the batched input is a 2D tensor :math:` ext{input}[i, j]`).
nn.Dropout3d	Randomly zero out entire channels (a channel is a 3D feature map, e.g., the \(j\)-th channel of the \(i\)-th sample in the batched input is a 3D tensor :math:` ext{input}[i, j]`).

Sparse Layers

nn.Embedding

A simple lookup table that stores embeddings of a fixed dictionary and size.

Distance Functions

nn.CosineSimilarity	Returns cosine similarity between \(x_1\) and \(x_2\), computed along dim.
nn.PairwiseDistance	Computes the pairwise distance between vectors \(v_1\), \(v_2\) using the p-norm:

Loss Functions

nn.BCELoss	This operator computes the binary cross entropy loss.
nn.BCEWithLogitsLoss	This operator combines the Sigmoid and BCELoss together.
nn.CTCLoss	The Connectionist Temporal Classification loss.
nn.CombinedMarginLoss	The operation implements “margin_softmax” in InsightFace: https://github.com/deepinsight/insightface/blob/master/recognition/arcface_mxnet/train.py The implementation of margin_softmax in InsightFace is composed of multiple operators.
nn.CrossEntropyLoss	The documentation is referenced from: https://pytorch.org/docs/1.10/generated/torch.nn.CrossEntropyLoss.html.
nn.KLDivLoss	The Kullback-Leibler divergence loss measure
nn.L1Loss	This operator computes the L1 Loss between each element in input and target.
nn.MSELoss	Creates a criterion that measures the mean squared error (squared L2 norm) between each element in the input \(x\) and target \(y\).
nn.MarginRankingLoss	Creates a criterion that measures the loss given inputs \(x1\), \(x2\), two 1D mini-batch Tensors, and a label 1D mini-batch tensor \(y\) (containing 1 or -1).
nn.NLLLoss	The negative log likelihood loss.
nn.SmoothL1Loss	Creates a criterion that uses a squared term if the absolute element-wise error falls below beta and an L1 term otherwise.
nn.TripletMarginLoss	Creates a criterion that measures the triplet loss given an input tensors \(x1\), \(x2\), \(x3\) and a margin with a value greater than \(0\).

Vision Layers

nn.PixelShuffle	alias of oneflow.nn.modules.pixelshuffle.PixelShufflev2
nn.Upsample	Upsamples a given multi-channel 1D (temporal), 2D (spatial) or 3D (volumetric) data.
nn.UpsamplingBilinear2d	Applies a 2D bilinear upsampling to an input signal composed of several input channels.
nn.UpsamplingNearest2d	Applies a 2D nearest neighbor upsampling to an input signal composed of several input channels.

DataParallel Layers (multi-GPU, distributed)

nn.parallel.DistributedDataParallel

Data loading and preprocessing Layers

nn.COCOReader
nn.CoinFlip	Generates random boolean values following a bernoulli distribution.
nn.CropMirrorNormalize	Performs fused cropping, normalization, format conversion (NHWC to NCHW) if desired, and type casting.
nn.OFRecordBytesDecoder	This operator reads an tensor as bytes.
nn.OFRecordImageDecoder
nn.OFRecordImageDecoderRandomCrop
nn.OFRecordRawDecoder
nn.OFRecordReader

Quantization Aware Training

nn.MinMaxObserver	Compute the quantization parameters of the input tensor.
nn.MovingAverageMinMaxObserver	Compute the quantization parameters based on the moving average of the input tensor’s min and max values.
nn.FakeQuantization	Simulate the quantize and dequantize operations in training time.
nn.QatConv1d	A Conv1d module attached with nn.MinMaxObserver, nn.MovingAverageMinMaxObserver and nn.FakeQuantization modules for weight and input, used for quantization aware training.
nn.QatConv2d	A Conv2d module attached with nn.MinMaxObserver, nn.MovingAverageMinMaxObserver and nn.FakeQuantization modules for weight and input, used for quantization aware training.
nn.QatConv3d	A Conv3d module attached with nn.MinMaxObserver, nn.MovingAverageMinMaxObserver and nn.FakeQuantization modules for weight and input, used for quantization aware training.

Utilities

From the oneflow.nn.utils module

clip_grad_norm_	Clips gradient norm of an iterable of parameters.
clip_grad_value_	Clips gradient of an iterable of parameters at specified value.
weight_norm	Applies weight normalization to a parameter in the given module.
remove_weight_norm	Removes the weight normalization reparameterization from a module.

Utility functions in other modules

nn.utils.rnn.PackedSequence	The interface is consistent with PyTorch.
nn.utils.rnn.pack_padded_sequence	The interface is consistent with PyTorch.
nn.utils.rnn.pad_packed_sequence	The interface is consistent with PyTorch.
nn.utils.rnn.pad_sequence	The interface is consistent with PyTorch.
nn.utils.rnn.pack_sequence	Packs a list of variable length Tensors

nn.Flatten

Flattens a contiguous range of dims into a tensor.

Quantized Functions

Quantization refers to techniques for performing computations and storing tensors at lower bitwidths than floating point precision.

nn.FakeQuantization	Simulate the quantize and dequantize operations in training time.
nn.MinMaxObserver	Compute the quantization parameters of the input tensor.
nn.MovingAverageMinMaxObserver	Compute the quantization parameters based on the moving average of the input tensor’s min and max values.
nn.Quantization	Simulate the quantize operation in inference time.