[Fix]add traceback import

2019-04-11 14:04:35 +08:00 · 2019-04-11 14:04:35 +08:00 · 8684e4c15c
commit 8684e4c15c
parent bee61d79b0
1 changed files with 2 additions and 2 deletions
--- a/vnpy/app/cta_backtester/engine.py
+++ b/vnpy/app/cta_backtester/engine.py
@ -1,5 +1,6 @@
 import os
 import importlib
+import traceback
 from datetime import datetime
 from threading import Thread
 from pathlib import Path
@ -8,8 +9,7 @@ from vnpy.event import Event, EventEngine
 from vnpy.trader.engine import BaseEngine, MainEngine
 from vnpy.app.cta_strategy import (
    CtaTemplate,
-    BacktestingEngine,
-    OptimizationSetting
+    BacktestingEngine
 )