combine if elif

app.py

@@ -105,18 +105,8 @@ def url_infer(song: str, cache_dir="./__pycache__/mode2"):
     clean_cache(cache_dir)
     download_path = f"{cache_dir}/output.mp3"
     try:
-        if is_url(song):
-            if "163" in song and "?id=" in song:
-                song_id = get_first_integer(song.split("?id=")[1])
-                song = f"https://music.163.com/song/media/outer/url?id={song_id}.mp3"
-                song_name, free = music163_song_info(song_id)
-                if not free:
-                    raise AttributeError("Unable to parse VIP songs")
-
-            download_audio(song, download_path)
-
-        elif song.isdigit():
-            song_id = song
+        if (is_url(song) and "163" in song and "?id=" in song) or song.isdigit():
+            song_id = get_first_integer(song.split("?id=")[-1])
             song = f"https://music.163.com/song/media/outer/url?id={song_id}.mp3"
             song_name, free = music163_song_info(song_id)
             if not free: