pycharm 解决python3.8运行tornado项目报NotImplementedError错误

pycharm 解决python3.8运行tornado项目报NotImplementedError错误报错如下解决方法找到python的目录，然后进入Lib -> site-packages -> tornado -> platform,在platform中找到asyncio.py文件用记事本打开在此处添加if sys.platform == 'win32': asyncio.set_event_loop_policy(asyncio.WindowsSelec