challenging-america-word-ga.../run.ipynb

171 KiB

import torch
from torch import nn

torch.cuda.empty_cache()
import pandas as pd
import regex as re
import csv

def clean_text(text):
    text = text.lower().replace('-\\\\\\\\n', '').replace('\\\\\\\\n', ' ')
    text = re.sub(r'\p{P}', '', text)
    text = text.replace("'t", " not").replace("'s", " is").replace("'ll", " will").replace("'m", " am").replace("'ve", " have")

    return text
train_data = pd.read_csv('train/in.tsv.xz', sep='\t', error_bad_lines=False, warn_bad_lines=False, header=None, quoting=csv.QUOTE_NONE)
train_labels = pd.read_csv('train/expected.tsv', sep='\t', error_bad_lines=False, warn_bad_lines=False, header=None, quoting=csv.QUOTE_NONE)

train_data = train_data[[6, 7]]
train_data = pd.concat([train_data, train_labels], axis=1)

train_data['text'] = train_data[6] + train_data[0] + train_data[7]
train_data = train_data[['text']]

with open('processed_train.txt', 'w', encoding='utf-8') as file:
    for _, row in train_data.iterrows():
        text = clean_text(str(row['text']))
        file.write(text + '\n')
vocab_size = 40000
embed_size = 300
hidden_size = 128

class SimpleTrigramNeuralLanguageModel(nn.Module):
    def __init__(self, vocabulary_size, embedding_size, hidden_size):
        super(SimpleTrigramNeuralLanguageModel, self).__init__()
        self.embedding = nn.Embedding(vocabulary_size * 2, embedding_size)
        self.linear1 = nn.Linear(embedding_size, hidden_size)
        self.linear2 = nn.Linear(hidden_size, vocabulary_size * 2)

    def forward(self, x):
        x = self.embedding(x)
        x = self.linear1(x)
        x = self.linear2(x)
        x = torch.softmax(x, dim=1)
        return x
import regex as re
from itertools import islice, chain
from torchtext.vocab import build_vocab_from_iterator
from torch.utils.data import IterableDataset

def get_words_from_line(line):
    line = line.rstrip()
    yield '<s>'
    for m in re.finditer(r'[\p{L}0-9\*]+|\p{P}+', line):
        yield m.group(0).lower()
    yield '</s>'

def get_word_lines_from_file(file_name):
    with open(file_name, 'r', encoding='utf-8') as fh:
        for line in fh:
            yield get_words_from_line(line)
            
def look_ahead_iterator(gen):
    prev_1 = None
    prev_2 = None
    for item in gen:
        if prev_1 and prev_2:
            yield (prev_2 + prev_1, item)
        prev_2 = prev_1
        prev_1 = item
class Trigrams(IterableDataset):
    def __init__(self, text_file, vocabulary_size):
        self.vocab = build_vocab_from_iterator(
            get_word_lines_from_file(text_file),
            max_tokens = vocabulary_size,
            specials = ['<unk>']
        )
        self.vocab.set_default_index(self.vocab['<unk>'])
        self.vocabulary_size = vocabulary_size
        self.text_file = text_file

    def __iter__(self):
        return look_ahead_iterator((self.vocab[t] for t in chain.from_iterable(get_word_lines_from_file(self.text_file))))
from torch.utils.data import DataLoader

device = 'cuda' if torch.cuda.is_available() else 'cpu'
train_dataset = Trigrams('processed_train.txt', vocab_size)
model = SimpleTrigramNeuralLanguageModel(vocab_size, embed_size, hidden_size).to(device)
data = DataLoader(train_dataset, batch_size=800)
optimizer = torch.optim.Adam(model.parameters())
criterion = torch.nn.NLLLoss()
step = 0

for epoch in range(2):
    model.train()
    for x, y in data:
        x = x.to(device)
        y = y.to(device)
        optimizer.zero_grad()
        outputs = model(x)
        loss = criterion(torch.log(outputs), y)
        if step % 100 == 0:
            print(step, loss)
        step += 1
        loss.backward()
        optimizer.step()
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209800 tensor(6.2653, device='cuda:0', grad_fn=<NllLossBackward0>)
209900 tensor(6.2726, device='cuda:0', grad_fn=<NllLossBackward0>)
210000 tensor(6.2480, device='cuda:0', grad_fn=<NllLossBackward0>)
210100 tensor(5.8864, device='cuda:0', grad_fn=<NllLossBackward0>)
210200 tensor(6.4154, device='cuda:0', grad_fn=<NllLossBackward0>)
210300 tensor(6.3754, device='cuda:0', grad_fn=<NllLossBackward0>)
210400 tensor(6.3736, device='cuda:0', grad_fn=<NllLossBackward0>)
210500 tensor(6.0709, device='cuda:0', grad_fn=<NllLossBackward0>)
210600 tensor(6.4558, device='cuda:0', grad_fn=<NllLossBackward0>)
210700 tensor(6.2008, device='cuda:0', grad_fn=<NllLossBackward0>)
210800 tensor(6.4275, device='cuda:0', grad_fn=<NllLossBackward0>)
210900 tensor(6.1214, device='cuda:0', grad_fn=<NllLossBackward0>)
211000 tensor(6.0207, device='cuda:0', grad_fn=<NllLossBackward0>)
211100 tensor(6.1209, device='cuda:0', grad_fn=<NllLossBackward0>)
211200 tensor(6.2109, device='cuda:0', grad_fn=<NllLossBackward0>)
211300 tensor(6.0009, device='cuda:0', grad_fn=<NllLossBackward0>)
211400 tensor(6.2715, device='cuda:0', grad_fn=<NllLossBackward0>)
211500 tensor(6.4340, device='cuda:0', grad_fn=<NllLossBackward0>)
211600 tensor(6.4781, device='cuda:0', grad_fn=<NllLossBackward0>)
211700 tensor(6.2207, device='cuda:0', grad_fn=<NllLossBackward0>)
211800 tensor(6.2370, device='cuda:0', grad_fn=<NllLossBackward0>)
211900 tensor(5.9837, device='cuda:0', grad_fn=<NllLossBackward0>)
212000 tensor(6.2359, device='cuda:0', grad_fn=<NllLossBackward0>)
212100 tensor(6.4122, device='cuda:0', grad_fn=<NllLossBackward0>)
torch.save(model.state_dict(), 'model/model1.bin')
device = 'cuda'
model = SimpleTrigramNeuralLanguageModel(vocab_size, embed_size, hidden_size).to(device)
model.load_state_dict(torch.load('model/model1.bin'))
model.eval()

def predict(words):
    ixs = torch.tensor(train_dataset.vocab.forward(['with'])).to(device)
    predictions = model(ixs)
    top = torch.topk(out[0], 30)
    top_indices = top.indices.tolist()
    top_probs = top.values.tolist()
    top_words = train_dataset.vocab.lookup_tokens(top_indices)
    top_preds = list(zip(top_words, top_indices, top_probs))
    
    total_prob = 0.0
    pred_str = ''
    for word, _, prob in top_preds:
        if word != '<unk>':
            pred_str += f'{word}:{prob} '
            total_prob += prob
    pred_str += f':{1 - total_prob}'
    
    return pred_str
dev_data = pd.read_csv('dev-0/in.tsv.xz', sep='\t', error_bad_lines=False, warn_bad_lines=False, header=None, quoting=csv.QUOTE_NONE)
test_data = pd.read_csv('test-A/in.tsv.xz', sep='\t', error_bad_lines=False, warn_bad_lines=False, header=None, quoting=csv.QUOTE_NONE)
from nltk import word_tokenize

with open('dev-0/out.tsv', 'w') as file:
    for index, row in dev_data.iterrows():
        left_text = clean_text(str(row[6]))
        left_words = word_tokenize(left_text)
        if len(left_words) < 3:
            prediction = ':1.0'
        else:
            prediction = predict(left_words[-2:])
        file.write(prediction + '\n')
with open('test-A/out.tsv', 'w') as file:
    for index, row in test_data.iterrows():
        left_text = clean_text(str(row[6]))
        left_words = word_tokenize(left_text)
        if len(left_words) < 3:
            prediction = ':1.0'
        else:
            prediction = predict(left_words[-2:])
        file.write(prediction + '\n')