def find_shows_by_category(self, category, genre=None, area=None,
                               release_year=None, paid=None,
                               orderby='view-today-count',
                               streamtypes=None, person=None,
                               page=1, count=20):
        """doc: http://open.youku.com/docs/doc?id=62
        """
        url = 'https://openapi.youku.com/v2/shows/by_category.json'
        params = {
            'client_id': self.client_id,
            'category': category,
            'genre': genre,
            'area': area,
            'release_year': release_year,
            'paid': paid,
            'orderby': orderby,
            'streamtypes': streamtypes,
            'person': person,
            'page': page,
            'count': count
        }
        params = remove_none_value(params)
        r = requests.get(url, params=params)
        check_error(r)
        return r.json()
doc: http://open.youku.com/docs/doc?id=62