目標：

創建Spotify播放清單，清單內容為過去某一天的billboard前百大熱門歌曲

步驟前：

輸入想要獲取過去哪一天的音樂(日期格式：YYYY-MM-DD)

以下程式碼有做簡單的正則式，以輸入期望格式

is_continue = True
while is_continue:
    answer = input("Which year do you want to travel to? Type the date in this format YYYY-MM-DD：\\n")
    pattern = r'[0-9]{4}-[0-9]{2}-[0-9]{2}'
    if re.match(pattern, answer) is not None:
        is_continue = False

year = answer.split("-")[0]

步驟一：

Scraping Billboard Song List

full_url = URL + str(answer)
response = requests.get(url=full_url).text
soup = BeautifulSoup(response, 'html.parser')
songs = soup.find_all(name="span", class_="chart-element__information__song")
song_lst = [song.getText() for song in songs]

步驟二：

Authorized Spotify to get user id(在最下面有分享一些補充可以看一下)

credentials = SpotifyOAuth(
        client_id=CLIENT_ID,
        client_secret=CLIENT_SECRET,
        redirect_uri="<https://example.com/>",
        scope="playlist-modify-private",
        cache_path="token.txt")

token = credentials.get_access_token()['access_token']
sp = spotipy.Spotify(auth=token)
user_id = sp.current_user()['id']

sp = spotipy.Spotify(auth_manager=SpotifyOAuth(client_id=CLIENT_ID,
                                               client_secret=CLIENT_SECRET,
                                               redirect_uri="<https://example.com/>",
                                               scope="playlist-modify-private",
                                               cache_path="test_token.txt"))
user_id = sp.current_user()['id']

步驟三：

Search the song in Spotify and Save to empty list

song_id_lst = []
for song in song_lst:
    result = sp.search(q=f"track:{song} year:{year}", type="track")
    try:
        sond_track_id = result['tracks']['items'][0]['uri']
        song_id_lst.append(sond_track_id)
    except:
        print(f"{song} doesn't exist in Spotify.")

步驟四：