jupyter for colab
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Maciej(Linux)
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168
run_bigram.ipynb
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168
run_bigram.ipynb
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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"from itertools import islice\n",
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"import regex as re\n",
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"import sys\n",
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"from torchtext.vocab import build_vocab_from_iterator\n",
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"from torch import nn\n",
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"import torch\n",
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"from torch.utils.data import IterableDataset\n",
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"import itertools\n",
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"import pandas as pd\n",
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"from torch.utils.data import DataLoader\n",
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"import csv\n",
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"\n",
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"def data_preprocessing(text):\n",
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" return re.sub(r'\\p{P}', '', text.lower().replace('-\\\\n', '').replace('\\\\n', ' ').replace(\"'ll\", \" will\").replace(\"-\", \"\").replace(\"'ve\", \" have\").replace(\"'s\", \" is\"))\n",
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"\n",
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"def get_words_from_line(line):\n",
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" line = line.rstrip()\n",
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" yield '<s>'\n",
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" for m in re.finditer(r'[\\p{L}0-9\\*]+|\\p{P}+', line):\n",
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" yield m.group(0).lower()\n",
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" yield '</s>'\n",
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"\n",
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"\n",
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"def get_word_lines_from_file(data):\n",
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" for line in data:\n",
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" yield get_words_from_line(line)\n",
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"\n",
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"\n",
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"class SimpleBigramNeuralLanguageModel(nn.Module):\n",
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" def __init__(self, vocabulary_size, embedding_size):\n",
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" super(SimpleBigramNeuralLanguageModel, self).__init__()\n",
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" self.model = nn.Sequential(\n",
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" nn.Embedding(vocabulary_size, embedding_size),\n",
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" nn.Linear(embedding_size, vocabulary_size),\n",
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" nn.Softmax()\n",
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" )\n",
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"\n",
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" def forward(self, x):\n",
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" return self.model(x)\n",
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"\n",
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"\n",
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"def look_ahead_iterator(gen):\n",
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" prev = None\n",
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" for item in gen:\n",
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" if prev is not None:\n",
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" yield (prev, item)\n",
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" prev = item\n",
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"\n",
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"class Bigrams(IterableDataset):\n",
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" def __init__(self, text_file, vocabulary_size):\n",
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" self.vocab = build_vocab_from_iterator(\n",
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" get_word_lines_from_file(text_file),\n",
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" max_tokens = vocabulary_size,\n",
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" specials = ['<unk>'])\n",
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" self.vocab.set_default_index(self.vocab['<unk>'])\n",
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" self.vocabulary_size = vocabulary_size\n",
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" self.text_file = text_file\n",
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"\n",
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" def __iter__(self):\n",
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" return look_ahead_iterator(\n",
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" (self.vocab[t] for t in itertools.chain.from_iterable(get_word_lines_from_file(self.text_file))))\n",
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"\n",
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"in_file = 'train/in.tsv.xz'\n",
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"out_file = 'train/expected.tsv'\n",
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"\n",
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"train_set = pd.read_csv(\n",
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" 'train/in.tsv.xz',\n",
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" sep='\\t',\n",
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" header=None,\n",
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" quoting=csv.QUOTE_NONE,\n",
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" nrows=35000)\n",
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"\n",
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"train_labels = pd.read_csv(\n",
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" 'train/expected.tsv',\n",
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" sep='\\t',\n",
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" header=None,\n",
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" quoting=csv.QUOTE_NONE,\n",
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" nrows=35000)\n",
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"\n",
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"data = pd.concat([train_set, train_labels], axis=1)\n",
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"data = train_set[6] + train_set[0] + train_set[7]\n",
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"data = data.apply(data_preprocessing)\n",
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"\n",
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"vocab_size = 30000\n",
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"embed_size = 150\n",
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"\n",
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"\n",
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"bigram_data = Bigrams(data, vocab_size)\n",
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"\n",
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"device = 'cpu'\n",
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"model = SimpleBigramNeuralLanguageModel(vocab_size, embed_size).to(device)\n",
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"data = DataLoader(bigram_data, batch_size=5000)\n",
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"optimizer = torch.optim.Adam(model.parameters())\n",
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"criterion = torch.nn.NLLLoss()\n",
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"\n",
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"model.train()\n",
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"step = 0\n",
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"for x, y in data:\n",
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" x = x.to(device)\n",
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" y = y.to(device)\n",
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" optimizer.zero_grad()\n",
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" ypredicted = model(x)\n",
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" loss = criterion(torch.log(ypredicted), y)\n",
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" if step % 100 == 0:\n",
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" print(step, loss)\n",
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" step += 1\n",
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" loss.backward()\n",
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" optimizer.step()\n",
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"\n",
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"torch.save(model.state_dict(), 'model1.bin')\n",
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"\n",
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"vocab = bigram_data.vocab\n",
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"prediction = 'the:0.03 be:0.03 to:0.03 of:0.025 and:0.025 a:0.025 in:0.020 that:0.020 have:0.015 I:0.010 it:0.010 for:0.010 not:0.010 on:0.010 with:0.010 he:0.010 as:0.010 you:0.010 do:0.010 at:0.010 :0.77'\n",
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"\n",
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"def predict_word(w):\n",
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" ixs = torch.tensor(vocab.forward(w)).to(device)\n",
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" out = model(ixs)\n",
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" top = torch.topk(out[0], 8)\n",
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" top_indices = top.indices.tolist()\n",
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" top_probs = top.values.tolist()\n",
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" top_words = vocab.lookup_tokens(top_indices)\n",
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" pred_str = \"\"\n",
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" for word, prob in list(zip(top_words, top_probs)):\n",
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" pred_str += f\"{word}:{prob} \"\n",
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" return pred_str\n",
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"\n",
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"\n",
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"def predict(f):\n",
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" x = pd.read_csv(f'{f}/in.tsv.xz', sep='\\t', header=None, quoting=csv.QUOTE_NONE, on_bad_lines='skip', encoding=\"UTF-8\")[6]\n",
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" x = x.apply(data_preprocessing)\n",
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"\n",
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" with open(f'{f}/out.tsv', \"w+\", encoding=\"UTF-8\") as f:\n",
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" for row in x:\n",
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" result = {}\n",
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" before = None\n",
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" for before in get_words_from_line(data_preprocessing(str(row)), False):\n",
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" pass\n",
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" before = [before]\n",
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" if(len(before) < 1):\n",
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" pred_str = prediction\n",
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" else:\n",
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" pred_str = predict_word(before)\n",
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"\n",
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" pred_str = pred_str.strip()\n",
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" f.write(pred_str + \"\\n\")\n",
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"\n",
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"prediction(\"dev-0/\")\n",
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"prediction(\"test-A/\")"
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]
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}
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],
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"metadata": {
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"language_info": {
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"name": "python"
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},
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"orig_nbformat": 4
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}
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