SylvainDe / ComicBookMaker

        img = soup.find('div', id='comic').find('img')

        assert img['alt'] == title

        return {

            'title': title,

            'day': day,

            'month': month,

            'year': year,

            'img': [img['src']],

        }

class CalvinAndHobbes(GenericComic):

    """Class to retrieve Calvin and Hobbes comics."""

    # Also on http://www.gocomics.com/calvinandhobbes/

    name = 'calvin'

    long_name = 'Calvin and Hobbes'

    # This is not through any official webpage but eh...

    url = 'http://marcel-oehler.marcellosendos.ch/comics/ch/'

    @classmethod

    def get_next_comic(cls, last_comic):

        """Generator to get the next comic. Implementation of GenericComic's abstract method."""

        last_date = get_date_for_comic(

            last_comic) if last_comic else date(1985, 11, 1)

        link_re = re.compile('^([0-9]*)/([0-9]*)/')

        img_re = re.compile('')

        for link in get_soup_at_url(cls.url).find_all('a', href=link_re):

            url = link['href']

            year, month = link_re.match(url).groups()

            if date(int(year), int(month), 1) + timedelta(days=31) >= last_date:

                img_re = re.compile('^%s%s([0-9]*)' % (year, month))

                month_url = urljoin_wrapper(cls.url, url)

                for img in get_soup_at_url(month_url).find_all('img', src=img_re):

            'num': num,

            'title': archive_elt.string,

            'img': [soup.find('img', src=cls.comic_img_re)['src']]

        }

class PhDComics(GenericNavigableComic):

    """Class to retrieve PHD Comics."""

    name = 'phd'

    long_name = 'PhD Comics'

    url = 'http://phdcomics.com/comics/archive.php'

    get_url_from_link = join_cls_url_to_href

    @classmethod

    def get_first_comic_link(cls):

        """Get link to first comics."""

        return get_soup_at_url(cls.url).find('img', src='images/first_button.gif').parent

    @classmethod

    def get_navi_link(cls, last_soup, next_):

        """Get link to next or previous comic."""

        img = last_soup.find('img', src='images/next_button.gif' if next_ else 'images/prev_button.gif')

        return None if img is None else img.parent

    @classmethod

    def get_comic_info(cls, soup, link):

        """Get information about a particular comics."""

        date_str = soup.find('font', face='Arial,Helvetica,Geneva,Swiss,SunSans-Regular', color='white').string.strip()