Centos 7 安装 Python3.9.16
下载地址：https://www.python.org/ftp/python
1、下载Python官网（https://www.python.org/downloads/）对应的安装包，选择3.9.16的linux版本
wget https://www.python.org/ftp/python/3.9.16/Python-3.9.16.tgz
2、解压tgz包
tar zxvf Python-3.9.16.tgz -C /opt
3、创建Python3安装目录
mkdir /usr/local/python3
4、安装依赖包
yum install -y gcc zlib* zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel libffi-devel
5、配置安装路径。注意：openssl提前装好
cd /opt/Python-3.9.16/ ./configure --prefix=/usr/local/python3 --with-openssl=/usr/local/openssl
6、编译
make -j
7、安装
make install -j
8、建立软链接
ln -s /usr/local/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3
9、修改配置文件/etc/profile，增加以下内容：
PATH=$PATH:/usr/local/python3/bin
执行语句source /etc/profile使环境变量配置立即生效
10、设置 pip3 为清华源
pip3 config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple
11、确认源地址
pip3 config list | grep global.index-url
