Use selector event loop on Windows

aiodns requires the selector event loop for asyncio. In Python 3.8,
the default event loop for Windows was changed to proactor. To fix this,
the event loop is explicitly set to selector.

1 files changed, 6 insertions, 0 deletions

diff --git a/bot/__init__.py b/bot/__init__.py
index 2dd4af225..4131b69e9 100644
--- a/bot/__init__.py
+++ b/bot/__init__.py
@@ -1,3 +1,4 @@
+import asyncio
 import logging
 import os
 import sys
@@ -59,3 +60,8 @@ coloredlogs.install(logger=root_log, stream=sys.stdout)
 logging.getLogger("discord").setLevel(logging.WARNING)
 logging.getLogger("websockets").setLevel(logging.WARNING)
 logging.getLogger(__name__)
+
+
+# On Windows, the selector event loop is required for aiodns.
+if os.name == "nt":
+    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())