注意，一般官方接口都带有可导功能，如果你实现的层不具有可导功能，就需要自己实现梯度的反向传递。

官方Linear层：

class Linear(Module): 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): return F.linear(input, self.weight, self.bias) def extra_repr(self): return 'in_features={}, out_features={}, bias={}'.format( self.in_features, self.out_features, self.bias is not None )

实现view层

class Reshape(nn.Module): def __init__(self, *args): super(Reshape, self).__init__() self.shape = args def forward(self, x): return x.view((x.size(0),)+self.shape)

实现LinearWise层

class LinearWise(nn.Module): def __init__(self, in_features, bias=True): super(LinearWise, self).__init__() self.in_features = in_features self.weight = nn.Parameter(torch.Tensor(self.in_features)) if bias: self.bias = nn.Parameter(torch.Tensor(self.in_features)) else: self.register_parameter('bias', None) self.reset_parameters() def reset_parameters(self): stdv = 1. / math.sqrt(self.weight.size(0)) self.weight.data.uniform_(-stdv, stdv) if self.bias is not None: self.bias.data.uniform_(-stdv, stdv) def forward(self, input): x = input * self.weight if self.bias is not None: x = x + self.bias return x

以上这篇Pytorch 实现自定义参数层的例子就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。