Source code for cogdl.models.nn.mixhop

from cogdl.utils import add_remaining_self_loops
import math

import torch
import torch.nn as nn
import torch.nn.functional as F
from torch.nn.parameter import Parameter

from cogdl.layers import MixHopLayer

from .. import BaseModel, register_model

[docs]@register_model("mixhop") class MixHop(BaseModel):
[docs] @staticmethod def add_args(parser): """Add model-specific arguments to the parser.""" # fmt: off parser.add_argument("--num-features", type=int) parser.add_argument("--num-classes", type=int) parser.add_argument("--dropout", type=float, default=0.7) parser.add_argument("--layer1-pows", type=int, nargs="+", default=[200, 200, 200]) parser.add_argument("--layer2-pows", type=int, nargs="+", default=[20, 20, 20])
# fmt: on
[docs] @classmethod def build_model_from_args(cls, args): return cls( args.num_features, args.num_classes, args.dropout, args.layer1_pows, args.layer2_pows, )
def __init__(self, num_features, num_classes, dropout, layer1_pows, layer2_pows): super(MixHop, self).__init__() self.dropout = dropout self.num_features = num_features self.num_classes = num_classes self.dropout = dropout layer_pows = [layer1_pows, layer2_pows] shapes = [num_features] + [sum(layer1_pows), sum(layer2_pows)] self.mixhops = nn.ModuleList( [MixHopLayer(shapes[layer], [0, 1, 2], layer_pows[layer]) for layer in range(len(layer_pows))] ) self.fc = nn.Linear(shapes[-1], num_classes)
[docs] def forward(self, x, edge_index): edge_index, _ = add_remaining_self_loops(edge_index) for mixhop in self.mixhops: x = F.relu(mixhop(x, edge_index)) x = F.dropout(x, p=self.dropout, x = self.fc(x) return x
[docs] def predict(self, data): return self.forward(data.x, data.edge_index)