dgl.DGLGraph.int

Cast the graph to one with idtype int32

If the graph already has idtype int32, the function directly returns it. Otherwise, it returns a cloned graph of idtype int32 with features copied (shallow copy).

Returns:: The graph of idtype int32.
Return type:: DGLGraph

Examples

The following example uses PyTorch backend.

>>> import dgl
>>> import torch

Create a graph of idtype int64.

>>> # (0, 1), (0, 2), (1, 2)
>>> g = dgl.graph((torch.tensor([0, 0, 1]), torch.tensor([1, 2, 2])))
>>> g.ndata['feat'] = torch.ones(3, 1)
>>> g.idtype
torch.int64

Cast the graph to one of idtype int32.

>>> # A cloned graph with an idtype of int32
>>> g_int = g.int()
>>> g_int.idtype
torch.int32
>>> # The idtype of the original graph does not change.
>>> g.idtype
torch.int64
>>> g_int.edges()
(tensor([0, 0, 1], dtype=torch.int32), tensor([1, 2, 2], dtype=torch.int32))
>>> g_int.ndata
{'feat': tensor([[1.],
                 [1.],
                 [1.]])}