Example：
import torch indices = torch.tensor([[0,1], [0,1]]) values = torch.tensor([2,3]) shape = torch.Size((2,2)) s = torch.sparse.FloatTensor(indices,values,shape) print(s) d = torch.tensor([[1,2], [3,4]]) print(d) print(torch.spmm(s,d)) """ tensor(indices=tensor([[0, 1], [0, 1]]), values=tensor([2, 3]), size=(2, 2), nnz=2, layout=torch.sparse_coo) tensor([[1, 2], [3, 4]]) tensor([[ 2, 4], [ 9, 12]]) """