From 2379ce5aad18db7c84e21abd10da2b9633eefe3d Mon Sep 17 00:00:00 2001
From: Xudong <xudong714@gmail.com>
Date: Tue, 17 Jul 2018 15:41:30 +0800
Subject: [PATCH] Update 2.2.md

directly call method getitem() will receive a NameError
we can use x.__getitem__(0) or index grammar x[0]
---
 2.2.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/2.2.md b/2.2.md
index d32813c..e4264a4 100644
--- a/2.2.md
+++ b/2.2.md
@@ -110,9 +110,9 @@ Python 中的元组（以及多数其它编程语言中的序列）下标都以
 >>> def make_rat(n, d):
         return (n, d)
 >>> def numer(x):
-        return getitem(x, 0)
+        return x.__getitem__(0)
 >>> def denom(x):
-        return getitem(x, 1)
+        return x.__getitem__(1)
 ```
 
 用于打印有理数的函数完成了我们对抽象数据结构的实现。
-- 
GitLab