{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 23,
   "id": "3312dc2a",
   "metadata": {},
   "outputs": [],
   "source": [
    "import vowpalwabbit\n",
    "import pandas as pd\n",
    "import re"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "id": "a5d2718d",
   "metadata": {},
   "outputs": [],
   "source": [
    "def prediction(path_in, path_out, model, categories):\n",
    "    data = pd.read_csv(path_in, header=None, sep='\\t')\n",
    "    data = data.drop(1, axis=1)\n",
    "    data.columns = ['year', 'text']\n",
    "\n",
    "    data['train_input'] = data.apply(lambda row: to_vowpalwabbit(row, categories), axis=1)\n",
    "\n",
    "    with open(path_out, 'w', encoding='utf-8') as file:\n",
    "        for example in data['train_input']:\n",
    "            predicted = model.predict(example)\n",
    "            text_predicted = dict((value, key) for key, value in categories.items()).get(predicted)\n",
    "            file.write(str(text_predicted) + '\\n')\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "id": "2273a549",
   "metadata": {},
   "outputs": [],
   "source": [
    "def to_vowpalwabbit(row, categories):\n",
    "    text = row['text'].replace('\\n', ' ').lower().strip()\n",
    "    text = re.sub(\"[^a-zA-Z -']\", '', text)\n",
    "    text = re.sub(\" +\", ' ', text)\n",
    "    year = row['year']\n",
    "    try:\n",
    "        category = categories[row['category']]\n",
    "    except KeyError:\n",
    "        category = ''\n",
    "\n",
    "    vw = f\"{category} | year:{year} text:{text}\\n\"\n",
    "\n",
    "    return vw"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "id": "83f7c5b5",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'news': 1, 'sport': 2, 'opinion': 3, 'business': 4, 'culture': 5, 'lifestyle': 6, 'removed': 7}\n"
     ]
    }
   ],
   "source": [
    "x_train = pd.read_csv('train/in.tsv', header=None, sep='\\t')\n",
    "x_train = x_train.drop(1, axis=1)\n",
    "x_train.columns = ['year', 'text']\n",
    "\n",
    "y_train = pd.read_csv('train/expected.tsv', header=None, sep='\\t')\n",
    "y_train.columns = ['category']\n",
    "\n",
    "data = pd.concat([x_train, y_train], axis=1)\n",
    "\n",
    "categories = {}\n",
    "\n",
    "for i, x in enumerate(data['category'].unique()):\n",
    "    categories[x] = i+1\n",
    "\n",
    "print(categories)\n",
    "    \n",
    "data['train_input'] = data.apply(lambda row: to_vowpalwabbit(row, categories), axis=1)\n",
    "\n",
    "model = vowpalwabbit.Workspace('--oaa 7 --learning_rate 0.99')\n",
    "\n",
    "for example in data['train_input']:\n",
    "    model.learn(example)\n",
    "\n",
    "prediction('dev-0/in.tsv', 'dev-0/out.tsv', model, categories)\n",
    "prediction('test-A/in.tsv', 'test-A/out.tsv', model, categories)\n",
    "prediction('test-B/in.tsv', 'test-B/out.tsv', model, categories)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "id": "caa9bb3b",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "[NbConvertApp] Converting notebook run.ipynb to script\n",
      "[NbConvertApp] Writing 1952 bytes to run.py\n"
     ]
    }
   ],
   "source": [
    "!jupyter nbconvert --to script run.ipynb"
   ]
  }
 ],
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   "language": "python",
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