Very simple multi-layer perceptron (also called FFN)
| 184 | |
| 185 | |
| 186 | class MLP(nn.Module): |
| 187 | """ Very simple multi-layer perceptron (also called FFN)""" |
| 188 | |
| 189 | def __init__(self, input_dim, hidden_dim, output_dim, num_layers): |
| 190 | super().__init__() |
| 191 | self.num_layers = num_layers |
| 192 | h = [hidden_dim] * (num_layers - 1) |
| 193 | self.layers = nn.ModuleList(nn.Linear(n, k) for n, k in zip([input_dim] + h, h + [output_dim])) |
| 194 | |
| 195 | def forward(self, x): |
| 196 | for i, layer in enumerate(self.layers): |
| 197 | x = F.relu(layer(x)) if i < self.num_layers - 1 else layer(x) |
| 198 | return x |