@@ -0,0 +1,275 @@
+import asyncio%0Aimport sys%0A%0Aif sys.platform == 'win32':%0A    # workaround for%0A    # https://github.com/tornadoweb/tornado/issues/2751%0A    # https://www.tornadoweb.org/en/stable/index.html#installation%0A    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())%0A

fix compatibility with Python 3.8 on Windows