pytorch/torch/nn/modules/linear.py
Luke Yeager e7c1e6a8e3 [pep8] Fix most lint automatically with autopep8
Here's the command I used to invoke autopep8 (in parallel!):

    git ls-files | grep '\.py$' | xargs -n1 -P`nproc` autopep8 -i

Several rules are ignored in setup.cfg. The goal is to let autopep8
handle everything which it can handle safely, and to disable any rules
which are tricky or controversial to address. We may want to come back
and re-enable some of these rules later, but I'm trying to make this
patch as safe as possible.

Also configures flake8 to match pep8's behavior.

Also configures TravisCI to check the whole project for lint.
2017-01-28 01:15:51 +01:00

64 lines
1.9 KiB
Python

import math
import torch
from torch.nn.parameter import Parameter
from .module import Module
class Linear(Module):
r"""Applies a linear transformation to the incoming data: :math:`y = Ax + b`
Args:
in_features: size of each input sample
out_features: size of each output sample
bias: If set to False, the layer will not learn an additive bias. Default: True
Shape:
- Input: :math:`(N, in\_features)`
- Output: :math:`(N, out\_features)`
Attributes:
weight: the learnable weights of the module of shape (out_features x in_features)
bias: the learnable bias of the module of shape (out_features)
Examples::
>>> m = nn.Linear(20, 30)
>>> input = autograd.Variable(torch.randn(128, 20))
>>> output = m(input)
>>> print(output.size())
"""
def __init__(self, in_features, out_features, bias=True):
super(Linear, self).__init__()
self.in_features = in_features
self.out_features = out_features
self.weight = Parameter(torch.Tensor(out_features, in_features))
if bias:
self.bias = Parameter(torch.Tensor(out_features))
else:
self.register_parameter('bias', None)
self.reset_parameters()
def reset_parameters(self):
stdv = 1. / math.sqrt(self.weight.size(1))
self.weight.data.uniform_(-stdv, stdv)
if self.bias is not None:
self.bias.data.uniform_(-stdv, stdv)
def forward(self, input):
if self.bias is None:
return self._backend.Linear()(input, self.weight)
else:
return self._backend.Linear()(input, self.weight, self.bias)
def __repr__(self):
return self.__class__.__name__ + ' (' \
+ str(self.in_features) + ' -> ' \
+ str(self.out_features) + ')'
# TODO: Bilinear
# TODO: PartialLinear - maybe in sparse?