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marvel_corpus.py
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marvel_corpus.py
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import re
import json
import requests
from scrapy.selector import Selector
from click import progressbar
from nltk.tokenize import word_tokenize
from nltk.tokenize import MWETokenizer
from nltk.tokenize.punkt import PunktSentenceTokenizer, PunktParameters
punkt_param = PunktParameters()
# FIX: define this set in some tidier way
punkt_param.abbrev_types = {'s.h.i.e.l.d', 'h.a.m.m.e.r', 'a.i.m', 'a.g.m', 'n.y.p.d', 'n.a.t.o', 'u.s.s.r', 's.t.r.i.k.e', 'u.l.t.i.m.a.t.u.m', 's.w.o.r.d', 'dr', 'mr', 'ms', 'mrs', 'u.s', 'u.s.a', 'u.n', 'u.k ', 'etc', 'st', 'col'}
sent_tokenizer = PunktSentenceTokenizer(punkt_param)
mwe_tokenizer = MWETokenizer()
basepath = 'http://marvel.wikia.com/'
def get_characters_list():
params = {'limit': 25000,
'category': 'Earth-616_Characters'}
return requests.get(basepath + 'api/v1/Articles/List/',
params=params).json()['items']
# TODO: avoid nearly repeating get_characters_list()
def get_others_list():
params = {'limit': 10000,
'category': 'Earth-616'}
return requests.get(basepath + 'api/v1/Articles/List/',
params=params).json()['items']
def load_page_list(page_list_path):
"""To load from stored local page lists (and be nice to Wikia servers)"""
return json.load(open(page_list_path))['items']
class Details():
def __init__(self, url, article_id):
self.url = url
self.html = None
self.sel = None
self.name = ''
self.content = ''
self.fetch_html()
self.create_selector()
self.set_article_id(article_id)
self.set_name()
self.set_content()
def fetch_html(self):
self.html = requests.get(basepath + self.url).text
def create_selector(self):
self.sel = Selector(text=self.html)
def set_article_id(self, article_id):
self.article_id = article_id
def set_name(self):
title_xpath = '//div[contains(@class, "header-title")]/h1/text()'
self.name = self.sel.xpath(title_xpath).extract_first()
self.name = self.name.replace(' (Earth-616)', '')
def set_content(self):
for scope in self.sel.xpath('//div[@id="WikiaArticle"]/*/p'):
text_parts = scope.xpath('.//text()').extract()
text_parts = [part.strip() for part in text_parts]
self.content += '%s\n' % ' '.join(text_parts)
text_links = scope.xpath('./a/text()').extract()
list(map(mwe_tokenizer.add_mwe, [l.split() for l in text_links]))
# remove reference indicators
self.content = re.sub(r'\[\d+\]', '',
self.content,
flags=re.MULTILINE)
# remove URLs
self.content = re.sub(r'^https?:\/\/.*[\r\n]*', '',
self.content,
flags=re.MULTILINE)
# tokenize content
content_tokenized = []
for sent in sent_tokenizer.tokenize(self.content):
# only include lines with more than two words
sent_tokens = word_tokenize(sent)
if len(sent_tokens) > 2:
# join known mwes
sent_mwes = mwe_tokenizer.tokenize(sent_tokens)
sent_normalized = ' '.join(sent_mwes)
content_tokenized.append(sent_normalized)
content_normalized = '\n'.join(content_tokenized)
self.content = content_normalized
# some rules to fix munged tokenization
self.content = re.sub(r'_ ', ' ',
self.content,
flags=re.MULTILINE)
self.content = re.sub(r' \. ', ' ',
self.content,
flags=re.MULTILINE)
self.content = re.sub(r'\s-(\w)', r'-\1',
self.content,
flags=re.MULTILINE)
def dump(self, path='marvel.txt'):
if len(self.content) == 0:
return False
with open(path, 'a') as f:
f.write('%d\n' % self.article_id)
f.write('%s\n' % self.name)
f.write('%s\n' % self.content)
f.write('\n')
def main():
dump_path = 'marvel.txt'
# reset dump
open(dump_path, 'w').close()
refs = []
refs.extend(get_others_list())
refs.extend(get_characters_list())
# clean titles (mostly names) to recognize as mwes
r = re.compile(r'\(.*\)')
names = [r.sub('', ref['title']).strip() for ref in refs]
list(map(mwe_tokenizer.add_mwe, [name.split() for name in names]))
with progressbar(refs) as bar:
for ref in bar:
details = Details(ref['url'], ref['id'])
details.dump(dump_path)
if __name__ == '__main__':
main()