import time
import threading

def music():
    for i in range(3):
        print("聽音樂。。。")
        time.sleep(0.5)

def coding():
    for i in range(3):
        print("敲代碼。。。")
        time.sleep(0.5)


if __name__ == '__main__':
    start = time.time()
    music_thread = threading.Thread(target=music)
    coding_thread = threading.Thread(target=coding)

    music_thread.start()
    coding_thread.start()

    music_thread.join()
    coding_thread.join()

    end = time.time()
    print(f'程序執行了{end - start}秒')

聽音樂。。。
敲代碼。。。
聽音樂。。。敲代碼。。。

敲代碼。。。
聽音樂。。。
程序執行了1.5029683113098145秒