[Rombualdo]

Well, I have been tampering with the recipe (which seems to be the exact word, since I have literally no idea about it), and it seems to work now. I just erased the last commands on pre and post processing. It probably would benefit fro some additional tweaking, but I will copy the new code here, in case somebody wants to use it or, evenbetter, improve it.

#!/usr/bin/env python
# -*- mode: python -*-
# -*- coding: utf-8 -*-

from __future__ import unicode_literals
__license__ = 'GPL v3'
__copyright__ = '2008-2016, Darko Miletic <darko.miletic at gmail.com>'
'''
clarin.com
'''

try:
from urllib.parse import urlencode
except ImportError:
from urllib import urlencode
from calibre import strftime
from calibre.web.feeds.news import BasicNewsRecipe


class Clarin(BasicNewsRecipe):
title = 'Clarín'
__author__ = 'Darko Miletic, updated by GGsalas'
description = 'Clarin.com. Noticias de la Argentina y el mundo. Información actualizada las 24 horas y en español. Informate ya'
publisher = 'Grupo Clarin'
category = 'news, politics, Argentina'
oldest_article = 1
max_articles_per_feed = 100
use_embedded_content = False
no_stylesheets = True
encoding = 'utf8'
delay = 1
language = 'es_AR'
publication_type = 'newspaper'
needs_subscription = 'optional'
INDEX = 'http://www.clarin.com'
LOGIN = 'https://app-pase.clarin.com/pase-registracion/app/pase/ingresarNavegable?execution=e1s1'
masthead_url = 'http://www.clarin.com/images/logo_clarin.svg'
cover_url = strftime('http://tapas.clarin.com/tapa/%Y/%m/%d/%Y%m%d_thumb.jpg')

compress_news_images = True
scale_news_images_to_device = True
compress_news_images_max_size = 10 # kB
scale_news_images = True
handle_gzip = True

# To get all the data (images)
auto_cleanup = False

extra_css = """
h1#title {
line-height: 1em;
margin: 0 0 .5em 0;
}
p.volanta {
font-size: .7em;
margin-bottom: .5em;
}
.bajada h2 {
font-size: 1em;
line-height: 1em;
color: #666666;
margin: 0 0 1em 0;
}
.figcaption {
font-style: italic;
font-size: .9em;
margin-bottom: .5em;
}
"""

conversion_options = {
'comment': description, 'tags': category, 'publisher': publisher, 'language': language
}

keep_only_tags = [
dict(name='p' , attrs={'class' : 'volanta'}),
dict(name='h1' , attrs={'id': 'title'}),
dict(name='div', attrs={'class' : 'bajada'}),
dict(name='div', attrs={'id' : 'galeria-trigger'}),
dict(name='div', attrs={'class' : 'body-nota'})

]

remove_tags = [
dict(name=['meta', 'base', 'link', 'iframe', 'embed', 'object']),
dict(attrs={'class': ['tags-bar', 'breadcrumb', 'share-bar', 'share', 'sp__SM']}),
dict(name='div', attrs={'class': lambda x: x and 'r-nota' in x.split()}),
dict(attrs={'id': ['relacionadas']}),
dict(name='a', attrs={'class':'content-new'})
]

remove_tags_after = dict(name='div', attrs={'id': 'relacionadas'})

remove_attributes = ['lang']

# Images on hightlights view
def populate_article_metadata(self, article, soup, first):
if first and hasattr(self, 'add_toc_thumbnail'):
picdiv = soup.find('img')
if picdiv is not None:
self.add_toc_thumbnail(article, picdiv['src'])

feeds = [
(u'Lo Ultimo', u'http://www.clarin.com/rss/lo-ultimo/'),
(u'Politica', u'http://www.clarin.com/rss/politica/'),
(u'Opinion', u'https://www.clarin.com/rss/opinion/'),
(u'Cultura', u'https://www.clarin.com/rss/cultura/'),
(u'Economia', u'https://www.clarin.com/rss/economia/'),
(u'Tecnologia', u'https://www.clarin.com/rss/tecnologia/'),
(u'RevistaN', u'https://www.clarin.com/rss/revista-enie/'),
(u'Viva', u'https://www.clarin.com/rss/viva/'),
(u'Deportes', u'http://www.clarin.com/rss/deportes/'),
(u'Mundo', u'http://www.clarin.com/rss/mundo/'),
(u'Espectaculos', u'http://www.clarin.com/rss/espectaculos/'),
(u'Sociedad', u'http://www.clarin.com/rss/sociedad/'),
(u'Ciudades', u'http://www.clarin.com/rss/ciudades/'),
(u'Policiales', u'http://www.clarin.com/rss/policiales/'),
(u'Internet', u'http://www.clarin.com/rss/internet/')
]

def get_browser(self):
br = BasicNewsRecipe.get_browser(self)
br.open(self.INDEX)
return br