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move the dgl functions out of tkg_utils to tkg_utils_dgl and update i…
…mports in cen and regcn
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Original file line number | Diff line number | Diff line change |
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import dgl | ||
import torch | ||
import numpy as np | ||
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def build_sub_graph(num_nodes, num_rels, triples, use_cuda, gpu, mode='dyn'): | ||
""" | ||
https://github.com/Lee-zix/CEN/blob/main/rgcn/utils.py | ||
:param node_id: node id in the large graph | ||
:param num_rels: number of relation | ||
:param src: relabeled src id | ||
:param rel: original rel id | ||
:param dst: relabeled dst id | ||
:param use_cuda: | ||
:return: | ||
""" | ||
def comp_deg_norm(g): | ||
in_deg = g.in_degrees(range(g.number_of_nodes())).float() | ||
in_deg[torch.nonzero(in_deg == 0).view(-1)] = 1 | ||
norm = 1.0 / in_deg | ||
return norm | ||
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src, rel, dst = triples.transpose() | ||
if mode =='static': | ||
src, dst = np.concatenate((src, dst)), np.concatenate((dst, src)) | ||
rel = np.concatenate((rel, rel + num_rels)) | ||
g = dgl.DGLGraph() | ||
g.add_nodes(num_nodes) | ||
#g.ndata['original_id'] = np.unique(np.concatenate((np.unique(triples[:,0]), np.unique(triples[:,2])))) | ||
g.add_edges(src, dst) | ||
norm = comp_deg_norm(g) | ||
#node_id =torch.arange(0, g.num_nodes(), dtype=torch.long).view(-1, 1) #updated to deal with the fact that ot only the first k nodes of our graph have static infos | ||
node_id = torch.arange(0, num_nodes, dtype=torch.long).view(-1, 1) | ||
g.ndata.update({'id': node_id, 'norm': norm.view(-1, 1)}) | ||
g.apply_edges(lambda edges: {'norm': edges.dst['norm'] * edges.src['norm']}) | ||
g.edata['type'] = torch.LongTensor(rel) | ||
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uniq_r, r_len, r_to_e = r2e(triples, num_rels) | ||
g.uniq_r = uniq_r | ||
g.r_to_e = r_to_e | ||
g.r_len = r_len | ||
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if use_cuda: | ||
g = g.to(gpu) | ||
g.r_to_e = torch.from_numpy(np.array(r_to_e)) | ||
return g |