def test_dynamic_addition(): N = 3 D = 1 g = DGLGraph() def _init(shape, dtype, ctx, ids): return F.copy_to(F.astype(F.randn(shape), dtype), ctx) g.set_n_initializer(_init) g.set_e_initializer(_init) def _message(edges): return { 'm': edges.src['h1'] + edges.dst['h2'] + edges.data['h1'] + edges.data['h2'] } def _reduce(nodes): return {'h': F.sum(nodes.mailbox['m'], 1)} def _apply(nodes): return {'h': nodes.data['h']} g.register_message_func(_message) g.register_reduce_func(_reduce) g.register_apply_node_func(_apply) g.set_n_initializer(dgl.init.zero_initializer) g.set_e_initializer(dgl.init.zero_initializer) # add nodes and edges g.add_nodes(N) g.ndata.update({'h1': F.randn((N, D)), 'h2': F.randn((N, D))}) g.add_nodes(3) g.add_edge(0, 1) g.add_edge(1, 0) g.edata.update({'h1': F.randn((2, D)), 'h2': F.randn((2, D))}) g.send() expected = F.copy_to(F.ones((g.number_of_edges(), ), dtype=F.int64), F.cpu()) assert F.array_equal(g._get_msg_index().tousertensor(), expected) # add more edges g.add_edges([0, 2], [2, 0], {'h1': F.randn((2, D))}) g.send(([0, 2], [2, 0])) g.recv(0) g.add_edge(1, 2) g.edges[4].data['h1'] = F.randn((1, D)) g.send((1, 2)) g.recv([1, 2]) h = g.ndata.pop('h') # a complete round of send and recv g.send() g.recv() assert F.allclose(h, g.ndata['h'])
def test_nx_conversion(): # check conversion between networkx and DGLGraph def _check_nx_feature(nxg, nf, ef): # check node and edge feature of nxg # this is used to check to_networkx num_nodes = len(nxg) num_edges = nxg.size() if num_nodes > 0: node_feat = ddict(list) for nid, attr in nxg.nodes(data=True): assert len(attr) == len(nf) for k in nxg.nodes[nid]: node_feat[k].append(attr[k].unsqueeze(0)) for k in node_feat: feat = th.cat(node_feat[k], dim=0) assert U.allclose(feat, nf[k]) else: assert len(nf) == 0 if num_edges > 0: edge_feat = ddict(lambda: [0] * num_edges) for u, v, attr in nxg.edges(data=True): assert len(attr) == len(ef) + 1 # extra id eid = attr['id'] for k in ef: edge_feat[k][eid] = attr[k].unsqueeze(0) for k in edge_feat: feat = th.cat(edge_feat[k], dim=0) assert U.allclose(feat, ef[k]) else: assert len(ef) == 0 n1 = th.randn(5, 3) n2 = th.randn(5, 10) n3 = th.randn(5, 4) e1 = th.randn(4, 5) e2 = th.randn(4, 7) g = DGLGraph(multigraph=True) g.add_nodes(5) g.add_edges([0, 1, 3, 4], [2, 4, 0, 3]) g.ndata.update({'n1': n1, 'n2': n2, 'n3': n3}) g.edata.update({'e1': e1, 'e2': e2}) # convert to networkx nxg = g.to_networkx(node_attrs=['n1', 'n3'], edge_attrs=['e1', 'e2']) assert len(nxg) == 5 assert nxg.size() == 4 _check_nx_feature(nxg, {'n1': n1, 'n3': n3}, {'e1': e1, 'e2': e2}) # convert to DGLGraph, nx graph has id in edge feature # use id feature to test non-tensor copy g.from_networkx(nxg, node_attrs=['n1'], edge_attrs=['e1', 'id']) # check graph size assert g.number_of_nodes() == 5 assert g.number_of_edges() == 4 # check number of features # test with existing dglgraph (so existing features should be cleared) assert len(g.ndata) == 1 assert len(g.edata) == 2 # check feature values assert U.allclose(g.ndata['n1'], n1) # with id in nx edge feature, e1 should follow original order assert U.allclose(g.edata['e1'], e1) assert th.equal(g.get_e_repr()['id'], th.arange(4)) # test conversion after modifying DGLGraph g.pop_e_repr( 'id') # pop id so we don't need to provide id when adding edges new_n = th.randn(2, 3) new_e = th.randn(3, 5) g.add_nodes(2, data={'n1': new_n}) # add three edges, one is a multi-edge g.add_edges([3, 6, 0], [4, 5, 2], data={'e1': new_e}) n1 = th.cat((n1, new_n), dim=0) e1 = th.cat((e1, new_e), dim=0) # convert to networkx again nxg = g.to_networkx(node_attrs=['n1'], edge_attrs=['e1']) assert len(nxg) == 7 assert nxg.size() == 7 _check_nx_feature(nxg, {'n1': n1}, {'e1': e1}) # now test convert from networkx without id in edge feature # first pop id in edge feature for _, _, attr in nxg.edges(data=True): attr.pop('id') # test with a new graph g = DGLGraph(multigraph=True) g.from_networkx(nxg, node_attrs=['n1'], edge_attrs=['e1']) # check graph size assert g.number_of_nodes() == 7 assert g.number_of_edges() == 7 # check number of features assert len(g.ndata) == 1 assert len(g.edata) == 1 # check feature values assert U.allclose(g.ndata['n1'], n1) # edge feature order follows nxg.edges() edge_feat = [] for _, _, attr in nxg.edges(data=True): edge_feat.append(attr['e1'].unsqueeze(0)) edge_feat = th.cat(edge_feat, dim=0) assert U.allclose(g.edata['e1'], edge_feat)
def test_nx_conversion(): # check conversion between networkx and DGLGraph def _check_nx_feature(nxg, nf, ef): num_nodes = len(nxg) num_edges = nxg.size() if num_nodes > 0: node_feat = ddict(list) for nid, attr in nxg.nodes(data=True): assert len(attr) == len(nf) for k in nxg.nodes[nid]: node_feat[k].append(attr[k].unsqueeze(0)) for k in node_feat: feat = th.cat(node_feat[k], dim=0) assert U.allclose(feat, nf[k]) else: assert len(nf) == 0 if num_edges > 0: edge_feat = ddict(lambda: [0] * num_edges) for u, v, attr in nxg.edges(data=True): assert len(attr) == len(ef) + 1 # extra id eid = attr['id'] for k in ef: edge_feat[k][eid] = attr[k].unsqueeze(0) for k in edge_feat: feat = th.cat(edge_feat[k], dim=0) assert U.allclose(feat, ef[k]) else: assert len(ef) == 0 n1 = th.randn(5, 3) n2 = th.randn(5, 10) n3 = th.randn(5, 4) e1 = th.randn(4, 5) e2 = th.randn(4, 7) g = DGLGraph(multigraph=True) g.add_nodes(5) g.add_edges([0, 1, 3, 4], [2, 4, 0, 3]) g.ndata.update({'n1': n1, 'n2': n2, 'n3': n3}) g.edata.update({'e1': e1, 'e2': e2}) # convert to networkx nxg = g.to_networkx(node_attrs=['n1', 'n3'], edge_attrs=['e1', 'e2']) assert len(nxg) == 5 assert nxg.size() == 4 _check_nx_feature(nxg, {'n1': n1, 'n3': n3}, {'e1': e1, 'e2': e2}) # convert to DGLGraph # use id feature to test non-tensor copy g.from_networkx(nxg, node_attrs=['n1'], edge_attrs=['e1', 'id']) assert g.number_of_nodes() == 5 assert g.number_of_edges() == 4 assert U.allclose(g.get_n_repr()['n1'], n1) assert U.allclose(g.get_e_repr()['e1'], e1) assert th.equal(g.get_e_repr()['id'], th.arange(4)) g.pop_e_repr('id') # test modifying DGLGraph new_n = th.randn(2, 3) new_e = th.randn(3, 5) g.add_nodes(2, data={'n1': new_n}) # add three edges, one is a multi-edge g.add_edges([3, 6, 0], [4, 5, 2], data={'e1': new_e}) n1 = th.cat((n1, new_n), dim=0) e1 = th.cat((e1, new_e), dim=0) # convert to networkx again nxg = g.to_networkx(node_attrs=['n1'], edge_attrs=['e1']) assert len(nxg) == 7 assert nxg.size() == 7 _check_nx_feature(nxg, {'n1': n1}, {'e1': e1})