记一次python升级版本遇到的事

py3study

发布于 2020-01-09 14:23:14

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发布于 2020-01-09 14:23:14

文章被收录于专栏：python3python3

误卸载python导致yum无法使用事件(总结)

由于服务器需要升级python，参照了一篇坑爹的文章卸载了旧版python # 卸载旧的python sudo rpm -evf --nodeps python 导致yum无法使用

# yum -v There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: No module named yum Please install a package which provides this module, or verify that the module is installed correctly. It's possible that the above module doesn't match the current version of Python, which is: 2.7.3 (#1, Feb 3 2012, 15:37:12) [GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] If you cannot solve this problem yourself, please go to the yum faq at:http://wiki.linux.duke.edu/YumFaq

由于yum是基于python centos6.2默认使用python2.6.6，我又源码安装了一遍python2.6.6，修改了vi /usr/bin/yum #/usr/bin/python修改为#/usr/bin/python2.6 执行yum-v还是不行~~

于是就从centos6.2光盘找python和yum的rpm包安装，一番尝试之后，发现有N个package需要重新安装，这里就不写尝试过程，终于搞定！

解决方法如下

cnetos6.2*64光盘rpm包地址http://mirrors.ustc.edu.cn/centos/6.2/os/x86_64/Packages/

需要安装这几个包 python-2.6.6-29.el6.x86_64.rpm python-devel-2.6.6-29.el6.x86_64.rpm python-iniparse-0.3.1-2.1.el6.noarch.rpm python-setuptools-0.6.10-3.el6.noarch.rpm python-urlgrabber-3.9.1-8.el6.noarch.rpm rpm-python-4.8.0-19.el6.x86_64.rpm yum-3.2.29-22.el6.centos.noarch.rpm yum-metadata-parser-1.1.2-16.el6.x86_64.rpm python-pycurl-7.19.0-8.el6.x86_64.rpm

注意rpm命令，必须要追加 –replacepkgs 参数，强制其重新安装，否则rpm会报告说package已安装。 rpm -Uvh --replacepkgs ***.rpm 如果仍然无法运行Yum，则运行 Python，import yum，查询下缺少什么东西。

# python Python 2.6.6 (r266:84292, Dec 7 2011, 20:48:22) [GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>>import yum

//会提示相关的错误，查找对应的rpm，装上即可，重复此过程，直到 yum 正常

关于yum异常问题处理之“土”方法：

#vim /usr/bin/yum

将首行显示的 !#/usr/bin/python 修改为 !#/usr/bin/python2.6（我的系统默认安装的是python2.6，你也可以用whereis python 查看升级前和升级后的版本）

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源码包安装了 python2.7 想还原为系统默认

whereis python

找到2.7 的python全部删掉，然后执行，yum 如果正常，则看python是否正常

结果有问题：

python