安装依赖
yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel psmisc libffi-devel
yum install gcc-c++ -y
#进入目录
cd /usr/src/
#下载源码 并解压
wget https://www.python.org/ftp/python/3.9.11/Python-3.9.11.tgz
tar -xf Python-3.9.11.tgz
#进入目录 编译安装
cd Python-3.9.11
./configure prefix=/usr/local/python3
make && make install
#备份之前的软链接
mv /usr/bin/python /usr/bin/python_old
mv /usr/bin/pip /usr/bin/pip_old
#创建软链接
ln -s /usr/local/python3/bin/python3.9 /usr/bin/python
ln -s /usr/local/python3/bin/pip3.9 /usr/bin/pip
#但现在yum会出错 需要修改下 需要修改以下3个文件
vi /usr/bin/yum
#!/usr/bin/python2.7
vi /usr/libexec/urlgrabber-ext-down
#!/usr/bin/python2.7
vi /usr/bin/yum-config-manager
#!/usr/bin/python2.7