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ee9b192
Delete app/model.py
Browse files- app/model.py +0 -76
app/model.py
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import torch.nn as nn
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import torch
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from transformers import BertModel, BertConfig, PreTrainedModel
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def get_device():
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if torch.cuda.is_available():
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return torch.device('cuda')
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else:
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return torch.device('cpu')
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USE_CUDA = False
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device = get_device()
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if device.type == 'cuda':
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USE_CUDA = True
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base_bert = 'indobenchmark/indobert-base-p2'
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HIDDEN_DIM = 768
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OUTPUT_DIM = 2 # 2 if Binary Classification
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BIDIRECTIONAL = True
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DROPOUT = 0.2 # 0.2
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class IndoBERTBiLSTM(PreTrainedModel):
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config_class = BertConfig
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def __init__(self, bert_config):
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super().__init__(bert_config)
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self.output_dim = OUTPUT_DIM
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self.n_layers = 1
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self.hidden_dim = HIDDEN_DIM
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self.bidirectional = BIDIRECTIONAL
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self.bert = BertModel.from_pretrained(base_bert)
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self.lstm = nn.LSTM(input_size=self.bert.config.hidden_size,
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hidden_size=self.hidden_dim,
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num_layers=self.n_layers,
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bidirectional=self.bidirectional,
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batch_first=True)
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self.dropout = nn.Dropout(DROPOUT)
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self.output_layer = nn.Linear(self.hidden_dim * 2 if self.bidirectional else self.hidden_dim, self.output_dim)
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def forward(self, input_ids, attention_mask):
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hidden = self.init_hidden(input_ids.shape[0])
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output = self.bert(input_ids=input_ids, attention_mask=attention_mask)
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sequence_output = output.last_hidden_state
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lstm_output, (hidden_last, cn_last) = self.lstm(sequence_output, hidden)
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hidden_last_L=hidden_last[-2]
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hidden_last_R=hidden_last[-1]
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hidden_last_out=torch.cat([hidden_last_L,hidden_last_R],dim=-1) #[16, 1536]
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# apply dropout
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out = self.dropout(hidden_last_out)
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# output layer
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logits = self.output_layer(out)
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return logits
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def init_hidden(self, batch_size):
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weight = next(self.parameters()).data
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number = 1
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if self.bidirectional:
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number = 2
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if (USE_CUDA):
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hidden = (weight.new(self.n_layers*number, batch_size, self.hidden_dim).zero_().float().cuda(),
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weight.new(self.n_layers*number, batch_size, self.hidden_dim).zero_().float().cuda()
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)
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else:
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hidden = (weight.new(self.n_layers*number, batch_size, self.hidden_dim).zero_().float(),
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weight.new(self.n_layers*number, batch_size, self.hidden_dim).zero_().float()
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)
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return hidden
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