Added the Freebase FB15k_237 dataset

CHANGELOG.md

@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ## [2.3.0] - 2023-MM-DD
 ### Added
+- Added the Freebase `FB15k_237` dataset ([#3204](https://github.com/pyg-team/pytorch_geometric/pull/3204))
 - Added `Data.update()` and `HeteroData.update()` functionality ([#6313](https://github.com/pyg-team/pytorch_geometric/pull/6313))
 - Added `PGExplainer` ([#6204](https://github.com/pyg-team/pytorch_geometric/pull/6204))
 - Added the `AirfRANS` dataset ([#6287](https://github.com/pyg-team/pytorch_geometric/pull/6287))

torch_geometric/data/data.py

@@ -778,6 +778,16 @@ def num_edge_features(self) -> int:
         r"""Returns the number of features per edge in the graph."""
         return self._store.num_edge_features
 
+    @property
+    def num_node_types(self) -> int:
+        r"""Returns the number of node types in the graph."""
+        return int(self.node_type.max()) + 1 if 'node_type' in self else 1
+
+    @property
+    def num_edge_types(self) -> int:
+        r"""Returns the number of edge types in the graph."""
+        return int(self.edge_type.max()) + 1 if 'edge_type' in self else 1
+
     def __iter__(self) -> Iterable:
         r"""Iterates over all attributes in the data, yielding their attribute
         names and values."""

torch_geometric/datasets/__init__.py

@@ -45,6 +45,7 @@
 from .suite_sparse import SuiteSparseMatrixCollection
 from .aminer import AMiner
 from .word_net import WordNet18, WordNet18RR
+from .freebase import FB15k_237
 from .wikics import WikiCS
 from .webkb import WebKB
 from .wikipedia_network import WikipediaNetwork
@@ -135,6 +136,7 @@
     'AMiner',
     'WordNet18',
     'WordNet18RR',
+    'FB15k_237',
     'WikiCS',
     'WebKB',
     'WikipediaNetwork',

torch_geometric/datasets/freebase.py

@@ -0,0 +1,89 @@
+from typing import Callable, List, Optional
+
+import torch
+
+from torch_geometric.data import Data, InMemoryDataset, download_url
+
+
+class FB15k_237(InMemoryDataset):
+    r"""The FB15K237 dataset from the `"Translating Embeddings for Modeling
+    Multi-Relational Data"
+    <https://papers.nips.cc/paper/5071-translating-embeddings-for-modeling
+    -multi-relational-data>`_ paper,
+    containing 14,541 entities, 237 relations and 310,116 fact triples.
+
+    .. note::
+
+        The original :class:`FB15k` dataset suffers from major test leakage
+        through inverse relations, where a large number of test triples could
+        be obtained by inverting triples in the training set.
+        In order to create a dataset without this characteristic, the
+        :class:`~torch_geometric.datasets.FB15k_237` describes a subset of
+        :class:`FB15k` where inverse relations are removed.
+
+    Args:
+        root (string): Root directory where the dataset should be saved.
+        split (string): If :obj:`"train"`, loads the training dataset.
+            If :obj:`"val"`, loads the validation dataset.
+            If :obj:`"test"`, loads the test dataset. (default: :obj:`"train"`)
+        transform (callable, optional): A function/transform that takes in an
+            :obj:`torch_geometric.data.Data` object and returns a transformed
+            version. The data object will be transformed before every access.
+            (default: :obj:`None`)
+        pre_transform (callable, optional): A function/transform that takes in
+            an :obj:`torch_geometric.data.Data` object and returns a
+            transformed version. The data object will be transformed before
+            being saved to disk. (default: :obj:`None`)
+    """
+    url = ('https://raw.githubusercontent.com/villmow/'
+           'datasets_knowledge_embedding/master/FB15k-237')
+
+    def __init__(self, root: str, split: str = "train",
+                 transform: Optional[Callable] = None,
+                 pre_transform: Optional[Callable] = None):
+        super().__init__(root, transform, pre_transform)
+
+        if split not in {'train', 'val', 'test'}:
+            raise ValueError(f"Invalid 'split' argument (got {split})")
+
+        path = self.processed_paths[['train', 'val', 'test'].index(split)]
+        self.data, self.slices = torch.load(path)
+
+    @property
+    def raw_file_names(self) -> List[str]:
+        return ['train.txt', 'valid.txt', 'test.txt']
+
+    @property
+    def processed_file_names(self) -> List[str]:
+        return ['train_data.pt', 'val_data.pt', 'test_data.pt']
+
+    def download(self):
+        for filename in self.raw_file_names:
+            download_url(f'{self.url}/{filename}', self.raw_dir)
+
+    def process(self):
+        data_list, node_dict, rel_dict = [], {}, {}
+        for path in self.raw_paths:
+            with open(path, 'r') as f:
+                data = [x.split('\t') for x in f.read().split('\n')[:-1]]
+
+            edge_index = torch.empty((2, len(data)), dtype=torch.long)
+            edge_type = torch.empty(len(data), dtype=torch.long)
+            for i, (src, rel, dst) in enumerate(data):
+                if src not in node_dict:
+                    node_dict[src] = len(node_dict)
+                if dst not in node_dict:
+                    node_dict[dst] = len(node_dict)
+                if rel not in rel_dict:
+                    rel_dict[rel] = len(rel_dict)
+
+                edge_index[0, i] = node_dict[src]
+                edge_index[1, i] = node_dict[dst]
+                edge_type[i] = rel_dict[rel]
+
+            data = Data(edge_index=edge_index, edge_type=edge_type)
+            data_list.append(data)
+
+        for data, path in zip(data_list, self.processed_paths):
+            data.num_nodes = len(node_dict)
+            torch.save(self.collate([data]), path)