Use False instead of 0.
diff --git a/Lib/SocketServer.py b/Lib/SocketServer.py
index 1928ad2..4437581 100644
--- a/Lib/SocketServer.py
+++ b/Lib/SocketServer.py
@@ -451,7 +451,7 @@
 
     # Decides how threads will act upon termination of the
     # main process
-    daemon_threads = 0
+    daemon_threads = False
 
     def process_request_thread(self, request, client_address):
         """Same as in BaseServer but as a thread.