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import json
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import os
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import torch
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from loguru import logger
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class KGForKBRD:
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def __init__(self, kg_dataset, debug=False):
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self.debug = debug
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dataset_dir = f"data/{kg_dataset}"
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with open(os.path.join(dataset_dir, "kg.json"), encoding="utf-8") as f:
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self.kg = json.load(f)
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with open(os.path.join(dataset_dir, "entity2id.json"), encoding="utf-8") as f:
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self.entity2id = json.load(f)
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with open(os.path.join(dataset_dir, "item_ids.json"), encoding="utf-8") as f:
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self.item_ids = json.load(f)
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with open(os.path.join(dataset_dir, "relation2id.json"), encoding="utf-8") as f:
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self.relation2id = json.load(f)
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self._prepare_kg()
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def _prepare_kg(self):
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edge_list = set()
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for entity in self.entity2id.values():
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if str(entity) in self.kg:
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for relation_and_tail in self.kg[str(entity)]:
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edge_list.add((entity, relation_and_tail[1], relation_and_tail[0]))
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edge_list.add((relation_and_tail[1], entity, relation_and_tail[0]))
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edge = torch.tensor(list(edge_list), dtype=torch.long)
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self.edge_index = edge[:, :2].t()
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self.edge_type = edge[:, 2]
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self.num_relations = len(self.relation2id)
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self.num_entities = len(self.entity2id)
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self.pad_id = self.entity2id["<pad>"] = len(self.entity2id)
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self.id2entity = {idx: ent for ent, idx in self.entity2id.items()}
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if self.debug:
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logger.debug(
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f"#edge: {len(edge)}, #relation: {self.num_relations}, "
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f"#entity: {len(self.entity2id)}"
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)
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def get_kg_info(self):
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kg_info = {
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"edge_index": self.edge_index,
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"edge_type": self.edge_type,
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"num_entities": self.num_entities,
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"num_relations": self.num_relations,
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"item_ids": self.item_ids,
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"pad_id": self.pad_id,
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"entity2id": self.entity2id,
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"id2entity": self.id2entity,
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}
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return kg_info
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