Python_thread模块是什么？有什么用？

"""
Python多线程的使用
"""
import time
import _thread
 
 
def sing(name):
    for i in range(3):
        print("%s正在唱歌...%d" % (name, i))
        time.sleep(1)
 
 
def play(name):
    for i in range(3):
        print("%s正在玩游戏...%d" % (name, i))
        time.sleep(1)
    
 
def single_thread_demo():
    """
    单线程案例
    """
    name = 'hui'
    sing(name)
    play(name)
 
 
def fun_multithread():
    """函数式使用多线程"""
    name = 'hui'
 
    # 启动唱歌、玩游戏线程
    sing_thread = _thread.start_new_thread(sing, (name, ))
    play_thread = _thread.start_new_thread(play, (name, ))
 
 
def main():
    # single_thread_demo()
 
    fun_multithread()
 
    # 防止主线程先执行完，导致子线程没有执行
    time.sleep(3)
 
 
if __name__ == '__main__':
    main()