forked from kubapok/en-ner-conll-2003
105 lines
3.6 KiB
Python
105 lines
3.6 KiB
Python
# imports
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import torch
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import pandas as pd
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import csv
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from torchtext.vocab import Vocab
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from collections import Counter
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class NERModel(torch.nn.Module):
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def __init__(self,):
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super(NERModel, self).__init__()
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self.emb = torch.nn.Embedding(23627,200)
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self.fc1 = torch.nn.Linear(600,9)
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def forward(self, x):
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x = self.emb(x)
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x = x.reshape(600)
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x = self.fc1(x)
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return x
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class NeuralNetworkModel(torch.nn.Module):
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def __init__(self, output_size):
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super(NeuralNetworkModel, self).__init__()
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self.fc1 = torch.nn.Linear(10_000, output_size)
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self.softmax = torch.nn.Softmax(dim=0)
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def forward(self, x):
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x = self.fc1(x)
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x = self.softmax(x)
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return x
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def build_vocab(dataset):
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counter = Counter()
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for document in dataset:
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counter.update(document)
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return Vocab(counter, specials=['<unk>', '<pad>', '<bos>', '<eos>'])
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def data_process(dt):
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return [torch.tensor([vocab['<bos>']] + [vocab[token] for token in document] + [vocab['<eos>']], dtype=torch.long)
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for document in dt]
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def labels_process(dt):
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return [torch.tensor([0] + document + [0], dtype=torch.long) for document in dt]
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LABELS = ['O','B-LOC', 'I-LOC','B-MISC', 'I-MISC', 'B-ORG', 'I-ORG', 'B-PER', 'I-PER']
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train = pd.read_csv("./train/train.tsv.xz", error_bad_lines=False, compression='xz', sep='\t', header=None, quoting=csv.QUOTE_NONE)
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dev = pd.read_csv('./dev-0/in.tsv', error_bad_lines=False, sep='\t', header=None, quoting=csv.QUOTE_NONE)
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test = pd.read_csv('./test-A/in.tsv', error_bad_lines=False, sep='\t', header=None, quoting=csv.QUOTE_NONE)
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tags = train[0].apply(lambda x: [LABELS.index(y) for y in x.split()])
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tokens = train[1].apply(lambda x: x.split())
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dev_tokens = dev[0].apply(lambda x: x.split())
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test_tokens = dev[0].apply(lambda x: x.split())
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vocab = build_vocab(tokens)
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train_labels = labels_process(tags)
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train_tokens_ids = data_process(tokens)
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print(train_labels[0][:10])
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print(train_tokens_ids[0][:10])
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ner_model = NERModel()
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nn_model = NeuralNetworkModel(len(train_tokens_ids))
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criterion = torch.nn.CrossEntropyLoss()
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optimizer = torch.optim.Adam(ner_model.parameters())
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for epoch in range(2):
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loss_score = 0
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acc_score = 0
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prec_score = 0
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selected_items = 0
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recall_score = 0
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relevant_items = 0
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items_total = 0
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nn_model.train()
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for i in range(100):
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for j in range(1, len(train_labels[i]) - 1):
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X = train_tokens_ids[i][j-1: j+2]
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Y = train_labels[i][j: j+1]
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Y_predictions = ner_model(X)
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acc_score += int(torch.argmax(Y_predictions) == Y)
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if torch.argmax(Y_predictions) != 0:
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selected_items +=1
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if torch.argmax(Y_predictions) != 0 and torch.argmax(Y_predictions) == Y.item():
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prec_score += 1
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if Y.item() != 0:
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relevant_items +=1
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if Y.item() != 0 and torch.argmax(Y_predictions) == Y.item():
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recall_score += 1
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items_total += 1
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optimizer.zero_grad()
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loss = criterion(Y_predictions.unsqueeze(0), Y)
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loss.backward()
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optimizer.step()
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loss_score += loss.item()
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precision = prec_score / selected_items
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recall = recall_score / relevant_items
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f1_score = (2*precision * recall) / (precision + recall)
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print('epoch: ', epoch)
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print('loss: ', loss_score / items_total)
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print('acc: ', acc_score / items_total)
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print('prec: ', precision)
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print('recall: : ', recall)
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print('f1: ', f1_score) |