From 758be028eed631deb925a98c7294b49d491bcec5 Mon Sep 17 00:00:00 2001
From: jiangzhonglian <jiang-s@163.com>
Date: Sun, 15 Mar 2020 14:38:41 +0800
Subject: [PATCH] =?UTF-8?q?py=203.x=20=E4=BF=AE=E6=94=B9=E7=89=88=E6=9C=AC?=
 =?UTF-8?q?=E9=97=AE=E9=A2=98?=
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---
 docs/ml/3.决策树.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/ml/3.决策树.md b/docs/ml/3.决策树.md
index 18af0f79..49f56580 100644
--- a/docs/ml/3.决策树.md
+++ b/docs/ml/3.决策树.md
@@ -318,7 +318,7 @@ def classify(inputTree, featLabels, testVec):
         classLabel 分类的结果值，需要映射label才能知道名称
     """
     # 获取tree的根节点对于的key值
-    firstStr = inputTree.keys()[0]
+    firstStr = list(inputTree.keys())[0]
     # 通过key得到根节点对应的value
     secondDict = inputTree[firstStr]
     # 判断根节点名称获取根节点在label中的先后顺序，这样就知道输入的testVec怎么开始对照树来做分类