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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def azlyrics(song):
 """ Returns the lyrics found in azlyrics for the specified mp3 file or an empty string if not found. """

    artist = song.artist.lower()
    if artist[0:2] == 'a ':
        artist = artist[2:]
    artist = normalize(artist, URLESCAPES, '')
    title = song.title.lower()
    title = normalize(title, URLESCAPES, '')

    url = 'https://www.azlyrics.com/lyrics/{}/{}.html'.format(artist, title)
    soup = get_url(url)
    body = soup.find_all('div', class_='')[-1]
    return body.get_text().strip()