'Downloads a banner image and saves it to the filename specified by banner_name
inside the show\'s root folder.
show_obj: a TVShow object for which to download a banner'

def save_banner(self, show_obj, which=0):

    banner_path = self.get_banner_path(show_obj)
    banner_data = self._retrieve_show_image(u'series', show_obj, which)
    if (not banner_data):
        sickrage.srCore.srLogger.debug(u'No    show    banner    image    was    retrieved,    unable    to    write    banner')
        return False
    return self._write_image(banner_data, banner_path)
