Python 2.6 升级安装 2.7遇到的readline问题

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通过上一篇文章脚本升级Python到2.7 之后发现一个问题，在python/iPython交互器（命令行下）不能使用删除/上下键无语法高亮，非常不方便。检索相关信息，发现pypi有单独的readline模块 pip 安装

^_^[16:29:48][root@master01 ~]#pip install readline
Collecting readline
/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Downloading readline-6.2.4.1.tar.gz (2.3MB)
    100% |████████████████████████████████| 2.3MB 88kB/s
Installing collected packages: readline
  Running setup.py install for readline
Successfully installed readline-6.2.4.1

源码安装

下载地址：https://pypi.python.org/pypi/readline/6.2.4.1
下载后解压安装python setup.py install
最后出错，提示如下
/usr/bin/ld: cannot find -lncurses
collect2: ld returned 1 exit status
error: command 'gcc' failed with exit status 1

原因是未找到ncurses，需要安安装ncurses-devel包后再次安装readline，提示成功，enjoy! FAQ:

    creating build/lib.linux-x86_64-2.7
    gcc -pthread -shared build/temp.linux-x86_64-2.7/Modules/2.x/readline.o readline/libreadline.a readline/libhistory.a -lncurses -o build/lib.linux-x86_64-2.7/readline.so
    gcc: readline/libreadline.a: No such file or directory
    gcc: readline/libhistory.a: No such file or directory
    error: command 'gcc' failed with exit status 1

    readline 是Python的一个内建模块，你看到这些错误信息是因为系统没有完成重建。可能是系统中缺少 patch 包。
    你可以试试 yum install patch