Fix base_manager.py

sinall · sinall · commit 39cfc17d62d7 · 2020-09-11T22:59:33.000+08:00
diff --git a/strategyease_sdk/base_manager.py b/strategyease_sdk/base_manager.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+import copy
 import time
 
 import tushare as ts
