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报错信息:

[root@localhost python]#  yum clean all

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 (r27:82500, Jul 27 2018, 10:51:17)

[GCC 4.8.2 20140120 (Red Hat 4.8.2-16)]

If you cannot solve this problem yourself, please go to

the yum faq at:

解决办法:

一、升级或卸载Python导致:

1、查看已安装python的版本,可能是当前系统存在多个python导致

[root@test

~]#

whereis python

python: /usr/bin/python2.6 /usr/bin/python /usr/bin/python2.6-config /usr/lib/python2.6 /usr/lib64/python2.6 /usr/include/python2.6 /usr/share/man/man1/python.1.gz

[root@test

~]# vi

/usr/bin/yum

将 #!/usr/bin/python

修改为 #!/usr/bin/python2.6

如果是源代码安装的,默认路径是/usr/local/bin/python2.6,做个软链接即可

rm -rf

/usr/bin/python

ln -s

/usr/local/bin/python2.6 /usr/bin/python

二、完全重装python和yum

1、删除现有Python

[root@test

~]# rpm

-qa|grep python|xargs rpm -ev --allmatches --nodeps

##强制删除已安装程序及其关联

[root@test

~]#

whereis python |xargs rm -frv ##删除所有残余文件

##xargs,允许你对输出执行其他某些命令

[root@test

~]#

whereis python ##验证删除,返回无结果

2、删除现有的yum

[root@test

~]# rpm

-qa|grep yum|xargs rpm -ev --allmatches --nodeps

[root@test

~]#

whereis yum |xargs rm -frv

3、从http://mirrors.163.com/centos/7/os/x86_64/Packages/下载相应的包

python-2.7.5-68.el7.x86_64.rpm

python-backports-1.0-8.el7.x86_64.rpm

python-backports-ssl_match_hostname-3.5.0.1-1.el7.noarch.rpm

python-chardet-2.2.1-1.el7_1.noarch.rpm

python-devel-2.7.5-68.el7.x86_64.rpm

python-iniparse-0.4-9.el7.noarch.rpm

python-ipaddress-1.0.16-2.el7.noarch.rpm

python-kitchen-1.1.1-5.el7.noarch.rpm

python-libs-2.7.5-68.el7.x86_64.rpm

python-pycurl-7.19.0-19.el7.x86_64.rpm

python-setuptools-0.9.8-7.el7.noarch.rpm

python-urlgrabber-3.10-8.el7.noarch.rpm

rpm-4.11.3-32.el7.x86_64.rpm

rpm-build-4.11.3-32.el7.x86_64.rpm

rpm-build-libs-4.11.3-32.el7.x86_64.rpm

rpm-devel-4.11.3-32.el7.x86_64.rpm

rpm-libs-4.11.3-32.el7.x86_64.rpm

rpm-python-4.11.3-32.el7.x86_64.rpm

rpm-sign-4.11.3-32.el7.x86_64.rpm

yum-3.4.3-158.el7.centos.noarch.rpm

yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

yum-plugin-aliases-1.1.31-45.el7.noarch.rpm

yum-plugin-fastestmirror-1.1.31-45.el7.noarch.rpm

yum-plugin-protectbase-1.1.31-45.el7.noarch.rpm

yum-utils-1.1.31-45.el7.noarch.rpm

libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm

openssl-1.0.2k-12.el7.x86_64.rpm

openssl-devel-1.0.2k-12.el7.x86_64.rpm

openssl-libs-1.0.2k-12.el7.x86_64.rpm

openssl-static-1.0.2k-12.el7.x86_64.rpm

由于源中版本会更新,具体请查看URL中的版本再下载下来![root@test ~]# rpm -Uvh

--replacepkgs openssl*.rpm[root@test

~]# ln -s /usr/bin/openssl

/usr/local/bin/openssl

[root@test

~]# rpm

-Uvh --replacepkgs python*.rpm[root@test ~]# ln -s

/usr/bin/python /usr/local/bin/python[root@test ~]# rpm -Uvh --replacepkgs

python-chardet-2.2.1-1.el7_1.noarch.rpm python-kitchen-1.1.1-5.el7.noarch.rpm[root@test

~]# rpm -Uvh

--replacepkgs libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm[root@test ~]# rpm -Uvh

--replacepkgs rpm-*.rpm

[root@test

~]# rpm

-Uvh --replacepkgs yum*.rpm

可能之间还需要zlib和zlib-devel包,根据情况下载并安装!

三、运行python进行测试

[root@test

~]#

python

Python 2.7.5 (default, Apr 11 2018, 07:36:10)

[GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux2

Type "help", "copyright", "credits" or "license" for more

information.

>>>

如上,要是什么都没报,则说明OK啦~