python3 multiprocessing windows环境下 pyinstaller打包exe运行无限创建进程问题

https://blog.csdn.net/fly_leopard/article/details/121610641

multiprocessing提供了freeze_support来实现main module的安全导入，在运行multiprocessing创建进程前调用该方法：

....
 
if __name__ == '__main__':
    import multiprocessing
    # 该方法作用是阻止子进程运行其后面的代码
    multiprocessing.freeze_support()
    pool = Pool(3)
    try:
        log.info("Start Program.")
        pool.apply_async(start_queue_manager, error_callback=error_callback)
        pool.apply_async(start_server, error_callback=error_callback).ready()
        pool.apply_async(start_browser, error_callback=error_callback)
    except:
        log.error(traceback.format_exc())
    finally:
        pool.close()
        pool.join()