Source code for torch_geometric.datasets.reddit2

import json
import os.path as osp
from typing import Callable, List, Optional

import numpy as np
import scipy.sparse as sp
import torch

from import Data, InMemoryDataset, download_google_url

[docs]class Reddit2(InMemoryDataset): r"""The Reddit dataset from the `"GraphSAINT: Graph Sampling Based Inductive Learning Method" <>`_ paper, containing Reddit posts belonging to different communities. .. note:: This is a sparser version of the original :obj:`~torch_geometric.datasets.Reddit` dataset (~23M edges instead of ~114M edges), and is used in papers such as `SGC <>`_ and `GraphSAINT <>`_. Args: root (str): Root directory where the dataset should be saved. transform (callable, optional): A function/transform that takes in an :obj:`` 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:`` object and returns a transformed version. The data object will be transformed before being saved to disk. (default: :obj:`None`) force_reload (bool, optional): Whether to re-process the dataset. (default: :obj:`False`) **STATS:** .. list-table:: :widths: 10 10 10 10 :header-rows: 1 * - #nodes - #edges - #features - #classes * - 232,965 - 23,213,838 - 602 - 41 """ adj_full_id = '1sncK996BM5lpuDf75lDFqCiDZyErc1c2' feats_id = '1ZsHaJ0ussP1W722krmEIp_8pwKAoi5b3' class_map_id = '1JF3Pjv9OboMNYs2aXRQGbJbc4t_nDd5u' role_id = '1nJIKd77lcAGU4j-kVNx_AIGEkveIKz3A' def __init__( self, root: str, transform: Optional[Callable] = None, pre_transform: Optional[Callable] = None, force_reload: bool = False, ) -> None: super().__init__(root, transform, pre_transform, force_reload=force_reload) self.load(self.processed_paths[0]) @property def raw_file_names(self) -> List[str]: return ['adj_full.npz', 'feats.npy', 'class_map.json', 'role.json'] @property def processed_file_names(self) -> str: return '' def download(self) -> None: download_google_url(self.adj_full_id, self.raw_dir, 'adj_full.npz') download_google_url(self.feats_id, self.raw_dir, 'feats.npy') download_google_url(self.class_map_id, self.raw_dir, 'class_map.json') download_google_url(self.role_id, self.raw_dir, 'role.json') def process(self) -> None: f = np.load(osp.join(self.raw_dir, 'adj_full.npz')) adj = sp.csr_matrix((f['data'], f['indices'], f['indptr']), f['shape']) adj = adj.tocoo() row = torch.from_numpy(adj.row).to(torch.long) col = torch.from_numpy(adj.col).to(torch.long) edge_index = torch.stack([row, col], dim=0) x = np.load(osp.join(self.raw_dir, 'feats.npy')) x = torch.from_numpy(x).to(torch.float) ys = [-1] * x.size(0) with open(osp.join(self.raw_dir, 'class_map.json')) as f: class_map = json.load(f) for key, item in class_map.items(): ys[int(key)] = item y = torch.tensor(ys) with open(osp.join(self.raw_dir, 'role.json')) as f: role = json.load(f) train_mask = torch.zeros(x.size(0), dtype=torch.bool) train_mask[torch.tensor(role['tr'])] = True val_mask = torch.zeros(x.size(0), dtype=torch.bool) val_mask[torch.tensor(role['va'])] = True test_mask = torch.zeros(x.size(0), dtype=torch.bool) test_mask[torch.tensor(role['te'])] = True data = Data(x=x, edge_index=edge_index, y=y, train_mask=train_mask, val_mask=val_mask, test_mask=test_mask) data = data if self.pre_transform is None else self.pre_transform(data)[data], self.processed_paths[0])