human
I wrote the below code

    if (len(fullreleaselist) == 0):
        raise ValueError('Empty    fullreleaselist')
    sortable_release_list = []
    formats = {'2xVinyl': '2', 'Vinyl': '2', 'CD': '0', 'Cassette': '3', '2xCD': '1', 'Digital    Media': '0'}
    countries = {'US': '0', 'GB': '1', 'JP': '2'}
    for release in fullreleaselist:
        try:
            format = int(formats[release['Format']])
        except (ValueError, KeyError):
            format = 3
        try:
            country = int(countries[release['Country']])
        except (ValueError, KeyError):
            country = 3
        release_dict = {'hasasin': bool(release['AlbumASIN']), 'asin': release['AlbumASIN'], 'trackscount': len(release['Tracks']), 'releaseid': release['ReleaseID'], 'releasedate': release['ReleaseDate'], 'format': format, 'country': country, 'tracks': release['Tracks']}
        sortable_release_list.append(release_dict)
    def getSortableReleaseDate(releaseDate):
        if (releaseDate is None):
            return 'None'
        if (releaseDate.count('-') == 2):
            return releaseDate
        elif (releaseDate.count('-') == 1):
            return (releaseDate + '32')
        else:
            return (releaseDate + '13-32')
    sortable_release_list.sort(key=(lambda x: getSortableReleaseDate(x['releasedate'])))
    average_tracks = (sum((x['trackscount'] for x in sortable_release_list)) / float(len(sortable_release_list)))
    for item in sortable_release_list:
        item['trackscount_delta'] = abs((average_tracks - item['trackscount']))
    a = helpers.multikeysort(sortable_release_list, ['-hasasin', 'country', 'format', 'trackscount_delta'])
    release_dict = {'ReleaseDate': sortable_release_list[0]['releasedate'], 'Tracks': a[0]['tracks'], 'AlbumASIN': a[0]['asin']}
    return release_dict

What's a good function header?
assistant
#Here's a good function header.

def getHybridRelease(fullreleaselist):