46 строки
1.7 KiB
Python
46 строки
1.7 KiB
Python
from typing import Dict, Any, List
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import tensorflow as tf
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from .sparse_graph_model import Sparse_Graph_Model
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from tasks import Sparse_Graph_Task
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from gnns import sparse_ggnn_layer
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class GGNN_Model(Sparse_Graph_Model):
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@classmethod
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def default_params(cls):
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params = super().default_params()
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params.update({
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'hidden_size': 128,
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'graph_rnn_cell': 'GRU', # RNN, GRU, or LSTM
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'graph_activation_function': "tanh",
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"message_aggregation_function": "sum",
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'graph_layer_input_dropout_keep_prob': 1.0,
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'graph_dense_between_every_num_gnn_layers': 10000,
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'graph_residual_connection_every_num_layers': 10000,
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})
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return params
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@staticmethod
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def name(params: Dict[str, Any]) -> str:
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return "GGNN"
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def __init__(self, params: Dict[str, Any], task: Sparse_Graph_Task, run_id: str, result_dir: str) -> None:
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super().__init__(params, task, run_id, result_dir)
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def _apply_gnn_layer(self,
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node_representations: tf.Tensor,
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adjacency_lists: List[tf.Tensor],
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type_to_num_incoming_edges: tf.Tensor,
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num_timesteps: int) -> tf.Tensor:
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return sparse_ggnn_layer(
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node_embeddings=node_representations,
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adjacency_lists=adjacency_lists,
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state_dim=self.params['hidden_size'],
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num_timesteps=num_timesteps,
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gated_unit_type=self.params['graph_rnn_cell'],
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activation_function=self.params['graph_activation_function'],
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message_aggregation_function=self.params['message_aggregation_function'],
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)
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