sudo yum install yum-plugin-versionlock -y

#查找软件
rpm -q python 
python-2.7.5-90.el7.x86_64

#锁定指定版本
sudo yum versionlock python-2.7.5-90.el7.x86_64

#锁定多个版本
sudo yum versionlock python*

#查看锁定
sudo yum versionlock list

#移除锁定
sudo yum versionlock delete python

#清除
sudo yum versionlock clear
sudo yum versionlock list

#/etc/yum.conf可以在配置文件添加过滤python升级不升级python版本
[main]
cachedir=/var/cache/yum/$basearch/$releasever
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
installonly_limit=3
distroverpkg=system-release
timeout=5
retries=7
exclude=python*
exclude=python3*