Pythonを使って多機能音楽プレーヤーを作る方法

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()