python非阻塞式后台运行bat脚本

首先，bat脚本要实现后台运行，代码如下：

C:\Users\linuxbugs\Desktop\demo\run_demo.bat

@echo off 
if "%1" == "h" goto begin 
mshta vbscript:createobject("wscript.shell").run("%~nx0 h",0)(window.close)&&exit 
:begin

python %CD%\main.py

然后我用python调用该脚本，并置于后台，不阻塞python继续向下运行

import os


def run():
    os.chdir(r'C:\Users\linuxbugs\Desktop\demo')
    os.popen('run_demo.bat')


if __name__ == '__main__':
    run()
    print("xxxxxx") # 会直接打印 xxxxxx run函数并不会阻塞