From 47e8bb16c794976be97d4de92d0b8bfea35f066c Mon Sep 17 00:00:00 2001
From: msincenselee <incenselee@hotmail.com>
Date: Wed, 26 Jan 2022 10:07:59 +0800
Subject: [PATCH] =?UTF-8?q?[bug=20fix]=20=E5=A2=9E=E5=8A=A0=E5=85=BC?=
 =?UTF-8?q?=E5=AE=B9=E6=80=A7?=
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---
 vnpy/trader/engine.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/vnpy/trader/engine.py b/vnpy/trader/engine.py
index d0af5f6b..8247f982 100644
--- a/vnpy/trader/engine.py
+++ b/vnpy/trader/engine.py
@@ -145,14 +145,17 @@ class MainEngine:
 
         print(msg, file=sys.stderr)
 
-
     def get_gateway(self, gateway_name: str) -> BaseGateway:
         """
         Return gateway object by name.
         """
         gateway = self.gateways.get(gateway_name, None)
         if not gateway:
-            self.write_error(f"找不到底层接口：{gateway_name}")
+            # 增加兼容得写法，如果没有输入gateway_name，但当前只有一个gateway时，就使用当前gateway
+            if len(self.gateways.keys()) == 1:
+                return self.gateways.values()[0]
+
+            self.write_error(f"在{self.gateways.keys()}中找不到底层接口：{gateway_name}")
         return gateway
 
     def get_engine(self, engine_name: str) -> "BaseEngine":