From afa7f1a227ede89d08d83694b810ddae9a78e5a7 Mon Sep 17 00:00:00 2001
From: "vn.py" <xiaoyou.chen@foxmail.com>
Date: Wed, 3 Jul 2019 11:28:08 +0800
Subject: [PATCH] [Add] demo_script.py for ScriptTrader

---
 examples/vn_trader/demo_script.py | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 examples/vn_trader/demo_script.py

diff --git a/examples/vn_trader/demo_script.py b/examples/vn_trader/demo_script.py
new file mode 100644
index 00000000..1078ee0b
--- /dev/null
+++ b/examples/vn_trader/demo_script.py
@@ -0,0 +1,27 @@
+from time import sleep
+from vnpy.app.script_trader import ScriptEngine
+
+
+def run(engine: ScriptEngine):
+    """"""
+    vt_symbols = ["IF1912.CFFEX", "rb2001.SHFE"]
+
+    # 订阅行情
+    engine.subscribe(vt_symbols)
+
+    # 获取合约信息
+    for vt_symbol in vt_symbols:
+        contract = engine.get_contract(vt_symbol)
+        msg = f"合约信息，{contract}"
+        engine.write_log(msg)
+
+    # 持续运行，使用strategy_active来判断是否要退出程序
+    while engine.strategy_active:
+        # 轮询获取行情
+        for vt_symbol in vt_symbols:
+            tick = engine.get_tick(vt_symbol)
+            msg = f"最新行情, {tick}"
+            engine.write_log(msg)
+
+        # 等待3秒进入下一轮
+        sleep(3)