Created
May 7, 2013 20:42
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| # -*- coding:utf-8 -*- | |
| # | |
| # Copyright (C) 2013, Maximilian Köhl <linuxmaxi@googlemail.com> | |
| # | |
| # This program is free software: you can redistribute it and/or modify | |
| # it under the terms of the GNU General Public License as published by | |
| # the Free Software Foundation, either version 3 of the License, or | |
| # (at your option) any later version. | |
| # | |
| # This program is distributed in the hope that it will be useful, | |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| # GNU General Public License for more details. | |
| # | |
| # You should have received a copy of the GNU General Public License | |
| # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| import re | |
| import shelve | |
| import urllib.request | |
| import bs4 | |
| WORD = re.compile(r'\w+') | |
| DATABASE = shelve.open('bayesian_filter.db') | |
| class Article(): | |
| def __init__(self, url): | |
| self.url = url | |
| content =urllib.request.urlopen(self.url).read().decode('utf-8') | |
| self.soups = [bs4.BeautifulSoup(content)] | |
| self.pages = [self.soups[0].find('article')] | |
| while True: | |
| page = self.pages[-1].find('a', attrs={'id' : 'atoc_next'}) | |
| if page is None: break | |
| url = 'http://www.golem.de{}'.format(page.attrs['href']) | |
| content = urllib.request.urlopen(url).read().decode('utf-8') | |
| self.soups.append(bs4.BeautifulSoup(content)) | |
| self.pages.append(self.soups[-1].find('article')) | |
| self.words = set() | |
| for page in self.pages: | |
| for tag in ('p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6'): | |
| for element in page.find_all(tag): | |
| for word in WORD.findall(element.text.lower()): | |
| self.words.add(word) | |
| class Archive(): | |
| def __init__(self, year=13, month=5): | |
| self.year = year | |
| self.month = month | |
| self.url = 'http://www.golem.de/aa-{:02}{:02}.html'.format(year, month) | |
| content = urllib.request.urlopen(self.url).read().decode('utf-8') | |
| self.articles = [] | |
| self.soup = bs4.BeautifulSoup(content) | |
| for ol in self.soup.find_all('ol', {'class' : 'list-tickers'}): | |
| for li in ol.find_all('li'): | |
| self.articles.append(li.find('a').attrs['href']) | |
| def like(article): | |
| for word in article.words: | |
| if word in DATABASE: | |
| DATABASE[word] = tuple(map(sum, zip(DATABASE[word], (1, 0, 0, 0)))) | |
| else: | |
| DATABASE[word] = (1, 0, 0, 0) | |
| for word in DATABASE: | |
| DATABASE[word] = tuple(map(sum, zip(DATABASE[word], (0, 0, 1, 0)))) | |
| def dislike(article): | |
| for word in article.words: | |
| if word in DATABASE: | |
| DATABASE[word] = tuple(map(sum, zip(DATABASE[word], (0, 1, 0, 0)))) | |
| else: | |
| DATABASE[word] = (0, 1, 0, 0) | |
| for word in DATABASE: | |
| DATABASE[word] = tuple(map(sum, zip(DATABASE[word], (0, 0, 0, 1)))) | |
| def calc(article, p=0.5): | |
| for word in article.words: | |
| if word not in DATABASE: continue | |
| if DATABASE[word][3] < 1 or DATABASE[word][2] < 1: continue | |
| p_like = p * DATABASE[word][0] / DATABASE[word][2] | |
| p_dislike = p * DATABASE[word][1] / DATABASE[word][3] | |
| p = p_like / (p_like + p_dislike) | |
| if p == 0: return p | |
| return p | |
| archive = Archive() | |
| for url in archive.articles: | |
| article = Article(url) | |
| print(article.url, calc(article)) | |
| answer = input('Like (y/n)? ') | |
| while answer not in ['y', 'n']: | |
| print('Please give a valid answer...') | |
| answer = input('Like (y/n)? ') | |
| if answer == 'y': | |
| like(article) | |
| else: | |
| dislike(article) |
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