Tkinter的索引不正确

Question

我正在开发一个搜索音乐程序。 但是我有一个问题，打印不是我的意图，所以我需要帮助。 我用tkinter，requests，lxml，BeautifulSoup开发 为什么会发生此错误？

这是我的代码

window = tkinter.Tk()
window.title('TEST')
window.geometry("640x400+100+100")
window.resizable(False, False)

def Search(event):
    listBox.delete(0, 'end')
    count = 1
    query = urlencode(entry.get())

    URL = 'https://music.bugs.co.kr/search/lyrics?q=' + query
    session = requests.Session()
    headers = session.get(URL)
    temp = headers.cookies.get_dict()
    temp['User-Agent'] =     
    res = requests.get(URL, headers=temp)
    soup = BeautifulSoup(res.text, 'lxml')

    title = soup.find_all('p', {'class': 'title'})
    artist = soup.find_all('p', {'class': 'artist'})

    for song, singer in zip(title, artist):
        titles = song.get_text()
        artists = singer.get_text()
        listBox.insert(count, "title : " + titles.strip())
        listBox.insert(count, "artist : " + artists.strip())
        count+=1

entry = tkinter.Entry(window)
entry.bind("<Return>", Search)
entry.pack()

listBox = tkinter.Listbox(window, selectmode='extended', height = 0, width=300)
listBox.delete(0)
listBox.pack()

window.mainloop()

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