怎么使用Python制作一个多功能音乐播放器

import pygameimport ospygame.init()class MusicPlayer:    def __init__(self):        self.playing = False        self.paused = False        self.volume = 0.5        self.playing_index = None        self.playlist = []    def load_playlist(self, folder_path):        self.playlist = []        for filename in os.listdir(folder_path):            if filename.endswith('.mp3'):                self.playlist.append(os.path.join(folder_path, filename))    def play(self, index):        if self.playing_index == index:            return        if self.playing:            pygame.mixer.music.stop()            self.playing = False        self.playing_index = index        pygame.mixer.music.load(self.playlist[self.playing_index])        pygame.mixer.music.set_volume(self.volume)        pygame.mixer.music.play()        self.playing = True        self.paused = False    def pause(self):        if not self.playing:            return        if self.paused:            pygame.mixer.music.unpause()            self.paused = False        else:            pygame.mixer.music.pause()            self.paused = True    def stop(self):        if not self.playing:            return        pygame.mixer.music.stop()        self.playing = False        self.paused = False    def set_volume(self, volume):        self.volume = volume        if self.playing:            pygame.mixer.music.set_volume(self.volume)    def next(self):        if not self.playing:            return        self.playing_index = (self.playing_index + 1) % len(self.playlist)        self.play(self.playing_index)    def prev(self):        if not self.playing:            return        self.playing_index = (self.playing_index - 1) % len(self.playlist)        self.play(self.playing_index)    def loop(self):        if not self.playing:            return        pygame.mixer.music.queue(self.playlist[self.playing_index])music_player = MusicPlayer()music_player.load_playlist('music_folder_path')def mainloop():    while True:        # 读取键盘事件        for event in pygame.event.get():            if event.type == pygame.QUIT:                pygame.quit()                quit()            elif event.type == pygame.KEYDOWN:                if event.key == pygame.K_SPACE:                    music_player.pause()                elif event.key == pygame.K_s:                    music_player.stop()                elif event.key == pygame.K_RIGHT:                    music_player.next()                elif event.key == pygame.K_LEFT:                    music_player.prev()                elif event.key == pygame.K_l:                    music_player.loop()        # 设置音量        volume = pygame.key.get_pressed()[pygame.K_UP] - pygame.key.get_pressed()[pygame.K_DOWN]        if volume != 0:            new_volume = music_player.volume + volume * 0.05            new_volume = min(max(new_volume, 0), 1)            music_player.set_volume(new_volume)        # 显示当前播放状态        if music_player.playing:            print('Now playing:', music_player.playlist[music_player.playing_index])            print('Volume:', music_player.volume)            print('Playing:', music_player.playing)            print('Paused:', music_player.paused)        pygame.time.wait(100)if __name__ == '__main__':    mainloop()