gat.py has an error

[brucetby]

for the code:

for _ in range(num_layers - 2):
    self.convs.append(GATConv(hidden_channels*layer_heads[i-1], hidden_channels, heads=layer_heads[i], concat=True))
    if self.batchnorm:
        self.bns.append(torch.nn.BatchNorm1d(hidden_channels*layer_heads[i-1]))

the _ should be i