1. 安装依赖

 yum groupinstall "Development Tools" -y
 yum install gcc zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel xz xz-devel libffi-devel wget -y

2.下载并编译安装 Python 3.9

 cd /usr/local/src
 wget https://www.python.org/ftp/python/3.9.19/Python-3.9.19.tgz
 tar -xzf Python-3.9.19.tgz
 cd Python-3.9.19
 ./configure --enable-optimizations
 make -j$(nproc)
 make altinstall  # 注意是 altinstall，避免替换系统自带 python
 #安装后会有
 /usr/local/bin/python3.9
 /usr/local/bin/pip3.9

3.设置软链接（可选）

 ln -sf /usr/local/bin/python3.9 /usr/bin/python3
 ln -sf /usr/local/bin/pip3.9 /usr/bin/pip
 ​
 #然后验证
 python3 --version
 pip --version