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challenging-america-word-gap-prediction-lstm
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final solution
2022-05-29 12:19:20 +02:00
{
"cells": [
{
"cell_type": "code",
"execution_count": 1,
"id": "03de852a",
"metadata": {},
"outputs": [],
"source": [
"import pandas as pd\n",
"import numpy as np\n",
"import regex as re\n",
"import csv\n",
"import torch\n",
"from torch import nn\n",
"from gensim.models import Word2Vec\n",
"from nltk.tokenize import word_tokenize"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "73497953",
"metadata": {},
"outputs": [],
"source": [
"torch.cuda.empty_cache()\n",
"device = 'cuda' if torch.cuda.is_available() else 'cpu'"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "4227ef55",
"metadata": {},
"outputs": [],
"source": [
"def clean_text(text):\n",
" text = text.lower().replace('-\\\\\\\\\\\\\\\\n', '').replace('\\\\\\\\\\\\\\\\n', ' ')\n",
" text = re.sub(r'\\p{P}', '', text)\n",
" text = text.replace(\"'t\", \" not\").replace(\"'s\", \" is\").replace(\"'ll\", \" will\").replace(\"'m\", \" am\").replace(\"'ve\", \" have\")\n",
"\n",
" return text"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "758cf94a",
"metadata": {},
"outputs": [],
"source": [
"train_data = pd.read_csv('train/in.tsv.xz', sep='\\t', on_bad_lines='skip', header=None, quoting=csv.QUOTE_NONE)\n",
"train_labels = pd.read_csv('train/expected.tsv', sep='\\t', on_bad_lines='skip', header=None, quoting=csv.QUOTE_NONE)\n",
"\n",
"train_data = train_data[[6, 7]]\n",
"train_data = pd.concat([train_data, train_labels], axis=1)"
]
},
{
"cell_type": "code",
"execution_count": 5,
"id": "384922c7",
"metadata": {},
"outputs": [],
"source": [
"class TrainCorpus:\n",
" def __init__(self, data):\n",
" self.data = data\n",
" \n",
" def __iter__(self):\n",
" for _, row in self.data.iterrows():\n",
" text = str(row[6]) + str(row[0]) + str(row[7])\n",
" text = clean_text(text)\n",
" yield word_tokenize(text)"
]
},
{
"cell_type": "code",
"execution_count": 6,
"id": "3da5f19b",
"metadata": {},
"outputs": [],
"source": [
"train_sentences = TrainCorpus(train_data.head(80000))\n",
"w2v_model = Word2Vec(vector_size=100, min_count=10)"
]
},
{
"cell_type": "code",
"execution_count": 7,
"id": "183d43be",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"81477\n"
]
}
],
"source": [
"w2v_model.build_vocab(corpus_iterable=train_sentences)\n",
"\n",
"key_to_index = w2v_model.wv.key_to_index\n",
"index_to_key = w2v_model.wv.index_to_key\n",
"\n",
"index_to_key.append('<unk>')\n",
"key_to_index['<unk>'] = len(index_to_key) - 1\n",
"\n",
"vocab_size = len(index_to_key)\n",
"print(vocab_size)"
]
},
{
"cell_type": "code",
"execution_count": 8,
"id": "e63dd9fe",
"metadata": {},
"outputs": [],
"source": [
"class TrainDataset(torch.utils.data.IterableDataset):\n",
" def __init__(self, data, index_to_key, key_to_index, reversed=False):\n",
" self.reversed = reversed\n",
" self.data = data\n",
" self.index_to_key = index_to_key\n",
" self.key_to_index = key_to_index\n",
" self.vocab_size = len(key_to_index)\n",
"\n",
" def __iter__(self):\n",
" for _, row in self.data.iterrows():\n",
" text = str(row[6]) + str(row[0]) + str(row[7])\n",
" text = clean_text(text)\n",
" tokens = word_tokenize(text)\n",
" if self.reversed:\n",
" tokens = list(reversed(tokens))\n",
" for i in range(5, len(tokens), 1):\n",
" input_context = tokens[i-5:i]\n",
" target_context = tokens[i-4:i+1]\n",
" #gap_word = tokens[i]\n",
" \n",
" input_embed = [self.key_to_index[word] if word in self.key_to_index else self.key_to_index['<unk>'] for word in input_context]\n",
" target_embed = [self.key_to_index[word] if word in self.key_to_index else self.key_to_index['<unk>'] for word in target_context]\n",
" #word_index = self.key_to_index[gap_word] if gap_word in self.key_to_index else self.key_to_index['<unk>']\n",
" #word_embed = np.concatenate([np.zeros(word_index), np.ones(1), np.zeros(vocab_size - word_index - 1)])\n",
" \n",
" yield np.asarray(input_embed, dtype=np.int64), np.asarray(target_embed, dtype=np.int64)"
]
},
{
"cell_type": "code",
"execution_count": 9,
"id": "7c60ddc1",
"metadata": {},
"outputs": [],
"source": [
"class Model(nn.Module):\n",
" def __init__(self, embed_size, vocab_size):\n",
" super(Model, self).__init__()\n",
" self.embed_size = embed_size\n",
" self.vocab_size = vocab_size\n",
" self.lstm_size = 128\n",
" self.num_layers = 2\n",
" \n",
" self.embed = nn.Embedding(num_embeddings=vocab_size, embedding_dim=self.embed_size)\n",
" self.lstm = nn.LSTM(input_size=self.embed_size, hidden_size=self.lstm_size, num_layers=self.num_layers, dropout=0.2)\n",
" self.fc = nn.Linear(self.lstm_size, vocab_size)\n",
"\n",
" def forward(self, x, prev_state = None):\n",
" embed = self.embed(x)\n",
" output, state = self.lstm(embed, prev_state)\n",
" logits = self.fc(output)\n",
" probs = torch.softmax(logits, dim=1)\n",
" return logits, state\n",
"\n",
" def init_state(self, sequence_length):\n",
" zeros = torch.zeros(self.num_layers, sequence_length, self.gru_size).to(device)\n",
" return (zeros, zeros)"
]
},
{
"cell_type": "code",
"execution_count": 10,
"id": "1c7b8fab",
"metadata": {},
"outputs": [],
"source": [
"from torch.utils.data import DataLoader\n",
"from torch.optim import Adam\n",
"\n",
"def train(dataset, model, max_epochs, batch_size):\n",
" model.train()\n",
"\n",
" dataloader = DataLoader(dataset, batch_size=batch_size)\n",
" criterion = nn.CrossEntropyLoss()\n",
" optimizer = Adam(model.parameters(), lr=0.001)\n",
"\n",
" for epoch in range(max_epochs):\n",
" for batch, (x, y) in enumerate(dataloader):\n",
" optimizer.zero_grad()\n",
" \n",
" x = x.to(device)\n",
" y = y.to(device)\n",
" \n",
" y_pred, (state_h, state_c) = model(x)\n",
" loss = criterion(y_pred.transpose(1, 2), y)\n",
"\n",
" loss.backward()\n",
" optimizer.step()\n",
" \n",
" if batch % 1000 == 0:\n",
" print(f'epoch: {epoch}, update in batch {batch}/???, loss: {loss.item()}')"
]
},
{
"cell_type": "code",
"execution_count": 11,
"id": "3531d21d",
"metadata": {},
"outputs": [],
"source": [
"train_dataset_front = TrainDataset(train_data.head(80000), index_to_key, key_to_index, False)\n",
"train_dataset_back = TrainDataset(train_data.tail(80000), index_to_key, key_to_index, True)"
]
},
{
"cell_type": "code",
"execution_count": 12,
"id": "f72f1f6d",
"metadata": {},
"outputs": [],
"source": [
"model_front = Model(100, vocab_size).to(device)\n",
"model_back = Model(100, vocab_size).to(device)"
]
},
{
"cell_type": "code",
"execution_count": 13,
"id": "d608d9fe",
"metadata": {
"scrolled": true
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
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"epoch: 0, update in batch 10000/???, loss: 6.435188293457031\n",
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]
},
{
"name": "stdout",
"output_type": "stream",
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}
],
"source": [
"train(train_dataset_front, model_front, 1, 64)"
]
},
{
"cell_type": "code",
"execution_count": 14,
"id": "132d9157",
"metadata": {},
"outputs": [
{
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{
"name": "stdout",
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]
},
{
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]
}
],
"source": [
"train(train_dataset_back, model_back, 1, 64)"
]
},
{
"cell_type": "code",
"execution_count": 30,
"id": "36a1b802",
"metadata": {},
"outputs": [],
"source": [
"def predict_probs(left_tokens, right_tokens):\n",
" model_front.eval()\n",
" model_back.eval()\n",
"\n",
" x_left = torch.tensor([[train_dataset_front.key_to_index[w] if w in key_to_index else train_dataset_front.key_to_index['<unk>'] for w in left_tokens]]).to(device)\n",
" x_right = torch.tensor([[train_dataset_front.key_to_index[w] if w in key_to_index else train_dataset_front.key_to_index['<unk>'] for w in right_tokens]]).to(device)\n",
" y_pred_left, (state_h_left, state_c_left) = model_front(x_left)\n",
" y_pred_right, (state_h_right, state_c_right) = model_back(x_right)\n",
"\n",
" last_word_logits_left = y_pred_left[0][-1]\n",
" last_word_logits_right = y_pred_right[0][-1]\n",
" probs_left = torch.nn.functional.softmax(last_word_logits_left, dim=0).detach().cpu().numpy()\n",
" probs_right = torch.nn.functional.softmax(last_word_logits_right, dim=0).detach().cpu().numpy()\n",
" \n",
" probs = [np.mean(k) for k in zip(probs_left, probs_right)]\n",
" \n",
" top_words = []\n",
" for index in range(len(probs)):\n",
" if len(top_words) < 30:\n",
" top_words.append((probs[index], [index]))\n",
" else:\n",
" worst_word = None\n",
" for word in top_words:\n",
" if not worst_word:\n",
" worst_word = word\n",
" else:\n",
" if word[0] < worst_word[0]:\n",
" worst_word = word\n",
" if worst_word[0] < probs[index] and index != len(probs) - 1:\n",
" top_words.remove(worst_word)\n",
" top_words.append((probs[index], [index]))\n",
" \n",
" prediction = ''\n",
" sum_prob = 0.0\n",
" for word in top_words:\n",
" sum_prob += word[0]\n",
" word_index = word[0]\n",
" word_text = index_to_key[word[1][0]]\n",
" prediction += f'{word_text}:{word_index} '\n",
" prediction += f':{1 - sum_prob}'\n",
" \n",
" return prediction"
]
},
{
"cell_type": "code",
"execution_count": 16,
"id": "155636b5",
"metadata": {},
"outputs": [],
"source": [
"dev_data = pd.read_csv('dev-0/in.tsv.xz', sep='\\t', on_bad_lines='skip', header=None, quoting=csv.QUOTE_NONE)\n",
"test_data = pd.read_csv('test-A/in.tsv.xz', sep='\\t', on_bad_lines='skip', header=None, quoting=csv.QUOTE_NONE)"
]
},
{
"cell_type": "code",
"execution_count": 39,
"id": "99b1d944",
"metadata": {},
"outputs": [],
"source": [
"with open('dev-0/out.tsv', 'w') as file:\n",
" for index, row in dev_data.iterrows():\n",
" left_text = clean_text(str(row[6]))\n",
" right_text = clean_text(str(row[7]))\n",
" left_words = word_tokenize(left_text)\n",
" right_words = word_tokenize(right_text)\n",
" right_words.reverse()\n",
" if len(left_words) < 6 or len(right_words) < 6:\n",
" prediction = ':1.0'\n",
" else:\n",
" prediction = predict_probs(left_words[-5:], right_words[-5:])\n",
" file.write(prediction + '\\n')"
]
},
{
"cell_type": "code",
"execution_count": 41,
"id": "186c3269",
"metadata": {},
"outputs": [],
"source": [
"with open('test-A/out.tsv', 'w') as file:\n",
" for index, row in test_data.iterrows():\n",
" left_text = clean_text(str(row[6]))\n",
" right_text = clean_text(str(row[7]))\n",
" left_words = word_tokenize(left_text)\n",
" right_words = word_tokenize(right_text)\n",
" right_words.reverse()\n",
" if len(left_words) < 6 or len(right_words) < 6:\n",
" prediction = ':1.0'\n",
" else:\n",
" prediction = predict_probs(left_words[-5:], right_words[-5:])\n",
" file.write(prediction + '\\n')"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.2"
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"nbformat": 4,
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