dgl.DGLGraph.batch_size

property DGLGraph.batch_size

Return the number of graphs in the batched graph.

Returns:

The Number of graphs in the batch. If the graph is not a batched one, it will return 1.

Return type:

int

Examples

The following example uses PyTorch backend.

>>> import dgl
>>> import torch

Query for homogeneous graphs.

>>> g1 = dgl.graph((torch.tensor([0, 1, 2]), torch.tensor([1, 2, 3])))
>>> g1.batch_size
1
>>> g2 = dgl.graph((torch.tensor([0, 0, 0, 1]), torch.tensor([0, 1, 2, 0])))
>>> bg = dgl.batch([g1, g2])
>>> bg.batch_size
2

Query for heterogeneous graphs.

>>> hg1 = dgl.heterograph({
...       ('user', 'plays', 'game') : (torch.tensor([0, 1]), torch.tensor([0, 0]))})
>>> hg1.batch_size
1
>>> hg2 = dgl.heterograph({
...       ('user', 'plays', 'game') : (torch.tensor([0, 0]), torch.tensor([1, 0]))})
>>> bg = dgl.batch([hg1, hg2])
>>> bg.batch_size
2