????????本人在一頓操作中誤刪了yum趾牧，然后在網(wǎng)上看各種安裝方式铃在，一直裝不上遥诉，還是要根據(jù)自己的情況去安裝须床，所以試了各種方式铐料，踩了各種坑最后才裝上。以下就是我的安裝方式豺旬，不能保證所有人都適用余赢，還是要根據(jù)自己的情況。
? ? 系統(tǒng)是CentOS7.4
重裝python2.7和yum
1.查看系統(tǒng)版本：
[root@izwz91xsu9fz728qyw7jodz ~]# lsb_release -a
2.刪除現(xiàn)有的python
[root@izwz91xsu9fz728qyw7jodz ~]# rpm -qa|grep python|xargs rpm -ev --allmatches --nodeps ##強制清除已安裝的程序及其關(guān)聯(lián)
[root@izwz91xsu9fz728qyw7jodz ~]# whereis python |xargs rm -frv ##刪除所有殘余文件 ##xargs哈垢，允許你對輸出執(zhí)行其他某些命令
[root@izwz91xsu9fz728qyw7jodz ~]#? whereis python ##驗證刪除妻柒，返回無結(jié)果說明清除干凈
3.刪除現(xiàn)有的yum
[root@izwz91xsu9fz728qyw7jodz ~]# rpm -qa|grep yum|xargs rpm -ev --allmatches --nodeps
[root@izwz91xsu9fz728qyw7jodz ~]# whereis yum |xargs rm -frv
4.創(chuàng)建一個目錄：python-need-pkg，將這些包下載下來耘分，從http://mirrors.163.com/centos/7/os/x86_64/Packages/下載響應(yīng)的包（注意：根據(jù)自己的系統(tǒng)下載举塔，源中版本會更新，具體查看URL中的版本再下載Ｇ筇）
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/lvm2-python-libs-2.02.180-8.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-2.7.5-76.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-backports-1.0-8.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-backports-ssl_match_hostname-3.5.0.1-1.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-chardet-2.2.1-1.el7_1.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-devel-2.7.5-76.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-ipaddress-1.0.16-2.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-kitchen-1.1.1-5.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-libs-2.7.5-76.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-pycurl-7.19.0-19.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-setuptools-0.9.8-7.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-9.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-virtualenv-15.1.0-2.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/rpm-4.11.3-35.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/rpm-build-4.11.3-35.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/rpm-build-libs-4.11.3-35.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/rpm-libs-4.11.3-35.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/rpm-python-4.11.3-35.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/rpm-sign-4.11.3-35.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-161.el7.centos.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-aliases-1.1.31-50.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-50.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-protectbase-1.1.31-50.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-50.el7.noarch.rpm
5.執(zhí)行命令安裝
1>執(zhí)行這一步的時候沒有依賴問題
[root@izwz91xsu9fz728qyw7jodz ~]# rpm -Uvh --replacepkgs python*.rpm
2>執(zhí)行這一步的時候報依賴問題央渣，有兩個，
[root@izwz91xsu9fz728qyw7jodz ~]#?rpm -Uvh --replacepkgs rpm-python*.rpm yum*.rpm
出現(xiàn)依賴錯誤
rpm = 4.11.3-35.el7?is needed by rpm-python-4.11.3-35.el7.x86_64
libxml2-python is needed by yum-utils-1.1.31-50.el7.noarch
網(wǎng)上說強制安裝渴频，我自己強制安裝后芽丹，查看yum [root@izwz91xsu9fz728qyw7jodz ~]#?yum? 報了這樣一個錯
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
? /usr/lib64/python2.7/site-packages/rpm/_rpm.so: undefined symbol: rpmtsAddReinstallElement
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:
2.7.5 (default, Oct 30 2018, 23:45:53)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)]
If you cannot solve this problem yourself, please go to
the yum faq at:
? http://yum.baseurl.org/wiki/Faq
可能代表著你的rpm包沒安裝全
在我安裝[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# rpm -ivh rpm-python-4.11.3-35.el7.x86_64.rpm 一直重復報這個依賴錯誤
我在https://segmentfault.com/q/1010000009194060這個評論看到解決方法
當我使用下列命令查看時，發(fā)現(xiàn)版本是25的
[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# rpm -qa|grep rpm
rpm-build-libs-4.11.3-25.el7.x86_64
rpm-4.11.3-25.el7.x86_64
perl-srpm-macros-1-8.el7.noarch
rpm-libs-4.11.3-25.el7.x86_64
rpm-python-4.11.3-25.el7.x86_64
redhat-rpm-config-9.1.0-87.el7.centos.noarch
與我要安裝的rpm-python-4.11.3-35.el7.x86_64.rpm的rpm版本不一致卜朗，我采用了如下辦法
我更新了rpm的三個包來使我安裝的版本和rpm版本一致：
[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# rpm -Uvh rpm-4.11.3-35.el7.x86_64.rpm rpm-build-libs-4.11.3-35.el7.x86_64.rpm rpm-libs-4.11.3-35.el7.x86_64.rpm
這時候再去安裝[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# rpm -ivh rpm-python-4.11.3-35.el7.x86_64.rpm 就可以了
還有一個依賴解決?libxml2-python is needed by yum-utils-1.1.31-50.el7.noarch 我選擇的是強制安裝
[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# rpm -ivh yum-utils-1.1.31-50.el7.noarch.rpm --force --nodeps
最后安裝：[root@izwz91xsu9fz728qyw7jodz ~]#?rpm -Uvh --replacepkgs rpm-python*.rpm yum*.rpm 就安裝成功了
6.查看python版本拔第，命令正常
[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# python
Python 2.7.5 (default, Jun 20 2019, 20:27:34)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
7.查看yum咕村，命令正常
[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# yum
Loaded plugins: aliases, fastestmirror, protectbase
You need to give some command
Usage: yum [options] COMMAND
8.在yum安裝成功后，可將源文件清空并下載新的源
可參考：https://blog.csdn.net/qq_36731677/article/details/58288979
之后逐步更新源數(shù)據(jù)
[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# yum clean all
[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# yum makecache
[root@izwz91xsu9fz728qyw7jodz python-need-pkgs]# yum --skip-broken update
我是linux菜鳥蚊俺，很多也不懂懈涛，這是我成功安裝的方法，希望能幫助到一些人泳猬，不懂得各位大神請多多指教批钠！
