dgl.DGLGraph.metagraph¶
-
DGLGraph.
metagraph
()¶ Return the metagraph of the heterograph.
The metagraph (or network schema) of a heterogeneous network specifies type constraints on the sets of nodes and edges between the nodes. For a formal definition, refer to Yizhou et al..
- Returns
The metagraph.
- Return type
Examples
The following example uses PyTorch backend.
>>> import dgl >>> import torch
>>> g = dgl.heterograph({ ... ('user', 'follows', 'user'): (torch.tensor([0, 1]), torch.tensor([1, 2])), ... ('user', 'follows', 'game'): (torch.tensor([0, 1, 2]), torch.tensor([1, 2, 3])), ... ('user', 'plays', 'game'): (torch.tensor([1, 3]), torch.tensor([2, 3])) ... }) >>> meta_g = g.metagraph() >>> meta_g.nodes() NodeView(('user', 'game')) >>> meta_g.edges() OutMultiEdgeDataView([('user', 'user'), ('user', 'game'), ('user', 'game')])