[Mod] 优化测试脚本细节

Author: vnpy

script/rpc_datafeed/datafeed_server.py

@@ -6,7 +6,7 @@
 PUB_ADDRESS = "tcp://*:66002"
 
 
-def main():
+def main() -> None:
     """"""
     event_engine = EventEngine()
     event_engine.start()

script/rpc_datafeed/run_trader.py

@@ -14,7 +14,7 @@
 SETTINGS["datafeed.password"] = "tcp://localhost:66002"
 
 
-def main():
+def main() -> None:
     """Start VeighNa Trader"""
     qapp = create_qapp()