怎么使用Python制作一个多功能音乐播放器

import pygame

import os

pygame.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()