dgl.DGLGraph.create_formats_ο
- DGLGraph.create_formats_()[source]ο
Create all sparse matrices allowed for the graph.
By default, we create sparse matrices for a graph only when necessary. In some cases we may want to create them immediately (e.g. in a multi-process data loader), which can be achieved via this API.
Examples
The following example uses PyTorch backend.
>>> import dgl >>> import torch
Homographs or Heterographs with A Single Edge Type
>>> g = dgl.graph(([0, 0, 1], [2, 3, 2])) >>> g.format() {'created': ['coo'], 'not created': ['csr', 'csc']} >>> g.create_formats_() >>> g.format() {'created': ['coo', 'csr', 'csc'], 'not created': []}
Heterographs with Multiple Edge Types
>>> g = dgl.heterograph({ ... ('user', 'plays', 'game'): (torch.tensor([0, 1, 1, 2]), ... torch.tensor([0, 0, 1, 1])), ... ('developer', 'develops', 'game'): (torch.tensor([0, 1]), ... torch.tensor([0, 1])) ... }) >>> g.format() {'created': ['coo'], 'not created': ['csr', 'csc']} >>> g.create_formats_() >>> g.format() {'created': ['coo', 'csr', 'csc'], 'not created': []}