From 2046b95c15aacdac096488a7a4c3e4287bc404a7 Mon Sep 17 00:00:00 2001
From: kinghuin <kinghuin_chull@163.com>
Date: Thu, 17 Sep 2020 11:00:49 +0800
Subject: [PATCH] Update hook.md

---
 docs/Secondary_development/hook.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/Secondary_development/hook.md b/docs/Secondary_development/hook.md
index 0b746b4f..c08ab1ef 100644
--- a/docs/Secondary_development/hook.md
+++ b/docs/Secondary_development/hook.md
@@ -19,6 +19,7 @@ Task定义了[组网事件](./how_to_define_task.md)和[运行事件](./how_to_d
 
 ```python
 import time
+from collections import OrderedDict
 
 import numpy as np
 
-- 
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