[Graphbolt] change dataset method to property. (#6023)

Co-authored-by: Ubuntu <ubuntu@ip-172-31-28-63.ap-northeast-1.compute.internal>

python/dgl/graphbolt/dataset.py

@@ -31,22 +31,27 @@ class Dataset:
     generate a subgraph.
     """
 
+    @property
     def train_sets(self) -> List[ItemSet] or List[ItemSetDict]:
         """Return the training sets."""
         raise NotImplementedError
 
+    @property
     def validation_sets(self) -> List[ItemSet] or List[ItemSetDict]:
         """Return the validation sets."""
         raise NotImplementedError
 
+    @property
     def test_sets(self) -> List[ItemSet] or List[ItemSetDict]:
         """Return the test sets."""
         raise NotImplementedError
 
+    @property
     def graph(self) -> object:
         """Return the graph."""
         raise NotImplementedError
 
+    @property
     def feature(self) -> Dict[object, FeatureStore]:
         """Return the feature."""
         raise NotImplementedError

python/dgl/graphbolt/impl/ondisk_dataset.py

@@ -281,22 +281,27 @@ class OnDiskDataset(Dataset):
         self._validation_sets = self._init_tvt_sets(self._meta.validation_sets)
         self._test_sets = self._init_tvt_sets(self._meta.test_sets)
 
+    @property
     def train_sets(self) -> List[ItemSet] or List[ItemSetDict]:
         """Return the training set."""
         return self._train_sets
 
+    @property
     def validation_sets(self) -> List[ItemSet] or List[ItemSetDict]:
         """Return the validation set."""
         return self._validation_sets
 
+    @property
     def test_sets(self) -> List[ItemSet] or List[ItemSetDict]:
         """Return the test set."""
         return self._test_sets
 
+    @property
     def graph(self) -> object:
         """Return the graph."""
         return self._graph
 
+    @property
     def feature(self) -> Dict[Tuple, TorchBasedFeatureStore]:
         """Return the feature."""
         return self._feature

tests/python/pytorch/graphbolt/test_ondisk_dataset.py

@@ -106,7 +106,7 @@ def test_OnDiskDataset_TVTSet_ItemSet_id_label():
         dataset = gb.OnDiskDataset(yaml_file)
 
         # Verify train set.
-        train_sets = dataset.train_sets()
+        train_sets = dataset.train_sets
         assert len(train_sets) == 2
         for train_set in train_sets:
             assert len(train_set) == 1000
@@ -117,7 +117,7 @@ def test_OnDiskDataset_TVTSet_ItemSet_id_label():
         train_sets = None
 
         # Verify validation set.
-        validation_sets = dataset.validation_sets()
+        validation_sets = dataset.validation_sets
         assert len(validation_sets) == 2
         for validation_set in validation_sets:
             assert len(validation_set) == 1000
@@ -128,7 +128,7 @@ def test_OnDiskDataset_TVTSet_ItemSet_id_label():
         validation_sets = None
 
         # Verify test set.
-        test_sets = dataset.test_sets()
+        test_sets = dataset.test_sets
         assert len(test_sets) == 2
         for test_set in test_sets:
             assert len(test_set) == 1000
@@ -151,9 +151,9 @@ def test_OnDiskDataset_TVTSet_ItemSet_id_label():
             f.write(yaml_content)
 
         dataset = gb.OnDiskDataset(yaml_file)
-        assert dataset.train_sets() is not None
-        assert dataset.validation_sets() is None
-        assert dataset.test_sets() is None
+        assert dataset.train_sets is not None
+        assert dataset.validation_sets is None
+        assert dataset.test_sets is None
         dataset = None
 
 
@@ -209,7 +209,7 @@ def test_OnDiskDataset_TVTSet_ItemSet_node_pair_label():
         dataset = gb.OnDiskDataset(yaml_file)
 
         # Verify train set.
-        train_sets = dataset.train_sets()
+        train_sets = dataset.train_sets
         assert len(train_sets) == 2
         for train_set in train_sets:
             assert len(train_set) == 1000
@@ -221,7 +221,7 @@ def test_OnDiskDataset_TVTSet_ItemSet_node_pair_label():
         train_sets = None
 
         # Verify validation set.
-        validation_sets = dataset.validation_sets()
+        validation_sets = dataset.validation_sets
         assert len(validation_sets) == 2
         for validation_set in validation_sets:
             assert len(validation_set) == 1000
@@ -233,7 +233,7 @@ def test_OnDiskDataset_TVTSet_ItemSet_node_pair_label():
         validation_sets = None
 
         # Verify test set.
-        test_sets = dataset.test_sets()
+        test_sets = dataset.test_sets
         assert len(test_sets) == 2
         for test_set in test_sets:
             assert len(test_set) == 1000
@@ -299,7 +299,7 @@ def test_OnDiskDataset_TVTSet_ItemSetDict_id_label():
         dataset = gb.OnDiskDataset(yaml_file)
 
         # Verify train set.
-        train_sets = dataset.train_sets()
+        train_sets = dataset.train_sets
         assert len(train_sets) == 2
         for train_set in train_sets:
             assert len(train_set) == 1000
@@ -315,7 +315,7 @@ def test_OnDiskDataset_TVTSet_ItemSetDict_id_label():
         train_sets = None
 
         # Verify validation set.
-        validation_sets = dataset.validation_sets()
+        validation_sets = dataset.validation_sets
         assert len(validation_sets) == 2
         for validation_set in validation_sets:
             assert len(validation_set) == 1000
@@ -331,7 +331,7 @@ def test_OnDiskDataset_TVTSet_ItemSetDict_id_label():
         validation_sets = None
 
         # Verify test set.
-        test_sets = dataset.test_sets()
+        test_sets = dataset.test_sets
         assert len(test_sets) == 2
         for test_set in test_sets:
             assert len(test_set) == 1000
@@ -401,7 +401,7 @@ def test_OnDiskDataset_TVTSet_ItemSetDict_node_pair_label():
         dataset = gb.OnDiskDataset(yaml_file)
 
         # Verify train set.
-        train_sets = dataset.train_sets()
+        train_sets = dataset.train_sets
         assert len(train_sets) == 2
         for train_set in train_sets:
             assert len(train_set) == 1000
@@ -418,7 +418,7 @@ def test_OnDiskDataset_TVTSet_ItemSetDict_node_pair_label():
         train_sets = None
 
         # Verify validation set.
-        validation_sets = dataset.validation_sets()
+        validation_sets = dataset.validation_sets
         assert len(validation_sets) == 2
         for validation_set in validation_sets:
             assert len(validation_set) == 1000
@@ -435,7 +435,7 @@ def test_OnDiskDataset_TVTSet_ItemSetDict_node_pair_label():
         validation_sets = None
 
         # Verify test set.
-        test_sets = dataset.test_sets()
+        test_sets = dataset.test_sets
         assert len(test_sets) == 2
         for test_set in test_sets:
             assert len(test_set) == 1000
@@ -507,7 +507,7 @@ def test_OnDiskDataset_Feature_heterograph():
         dataset = gb.OnDiskDataset(yaml_file)
 
         # Verify feature data storage.
-        feature_data = dataset.feature()
+        feature_data = dataset.feature
         assert len(feature_data) == 4
 
         # Verify node feature data.
@@ -595,7 +595,7 @@ def test_OnDiskDataset_Feature_homograph():
         dataset = gb.OnDiskDataset(yaml_file)
 
         # Verify feature data storage.
-        feature_data = dataset.feature()
+        feature_data = dataset.feature
         assert len(feature_data) == 4
 
         # Verify node feature data.
@@ -661,7 +661,7 @@ def test_OnDiskDataset_Graph_homogeneous():
             f.write(yaml_content)
 
         dataset = gb.OnDiskDataset(yaml_file)
-        graph2 = dataset.graph()
+        graph2 = dataset.graph
 
         assert graph.num_nodes == graph2.num_nodes
         assert graph.num_edges == graph2.num_edges
@@ -703,7 +703,7 @@ def test_OnDiskDataset_Graph_heterogeneous():
             f.write(yaml_content)
 
         dataset = gb.OnDiskDataset(yaml_file)
-        graph2 = dataset.graph()
+        graph2 = dataset.graph
 
         assert graph.num_nodes == graph2.num_nodes
         assert graph.num_edges == graph2.num_edges