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import torch
from torch_geometric.explain.algorithm.utils import (
clear_masks,
set_hetero_masks,
)
from torch_geometric.nn import GCNConv, HeteroConv, SAGEConv, to_hetero
class HeteroModel(torch.nn.Module):
def __init__(self):
super().__init__()
self.conv1 = HeteroConv({
('paper', 'to', 'paper'):
GCNConv(-1, 32),
('author', 'to', 'paper'):
SAGEConv((-1, -1), 32),
('paper', 'to', 'author'):
SAGEConv((-1, -1), 32),
})
self.conv2 = HeteroConv({
('paper', 'to', 'paper'):
GCNConv(-1, 32),
('author', 'to', 'paper'):
SAGEConv((-1, -1), 32),
('paper', 'to', 'author'):
SAGEConv((-1, -1), 32),
})
class GraphSAGE(torch.nn.Module):
def __init__(self):
super().__init__()
self.conv1 = SAGEConv((-1, -1), 32)
self.conv2 = SAGEConv((-1, -1), 32)
def forward(self, x, edge_index):
x = self.conv1(x, edge_index).relu()
return self.conv2(x, edge_index)
def test_set_clear_mask(hetero_data):
edge_mask_dict = {
('paper', 'to', 'paper'): torch.ones(200),
('author', 'to', 'paper'): torch.ones(100),
('paper', 'to', 'author'): torch.ones(100),
}
model = HeteroModel()
set_hetero_masks(model, edge_mask_dict, hetero_data.edge_index_dict)
for edge_type in hetero_data.edge_types:
# Check that masks are correctly set:
assert torch.allclose(model.conv1.convs[edge_type]._edge_mask,
edge_mask_dict[edge_type])
assert model.conv1.convs[edge_type].explain
clear_masks(model)
for edge_type in hetero_data.edge_types:
assert model.conv1.convs[edge_type]._edge_mask is None
assert not model.conv1.convs[edge_type].explain
model = to_hetero(GraphSAGE(), hetero_data.metadata(), debug=False)
set_hetero_masks(model, edge_mask_dict, hetero_data.edge_index_dict)
for edge_type in hetero_data.edge_types:
# Check that masks are correctly set:
str_edge_type = '__'.join(edge_type)
assert torch.allclose(model.conv1[str_edge_type]._edge_mask,
edge_mask_dict[edge_type])
assert model.conv1[str_edge_type].explain
clear_masks(model)
for edge_type in hetero_data.edge_types:
str_edge_type = '__'.join(edge_type)
assert model.conv1[str_edge_type]._edge_mask is None
assert not model.conv1[str_edge_type].explain
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