centos7 安装python3

1.安装编译工具

yum -y groupinstall "Development tools"
yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
yum install -y libffi-devel zlib1g-dev
yum install zlib* -y

2.找python3的包
到 https://www.python.org/ftp/python/ 找你需要的版本的包
3.解压

tar xf /usr/local/src/Python-3.7.6.tgz

4.编译安装
创建安装后python存放的目录

mkdir /usr/local/python3

进入到解压之后的目录

# cd /usr/local/Python-3.7.6
# ./configure --prefix=/usr/local/python 3 --with-ssl
--prefix指定安装之后文件的存放的路径
--with-ssl pip安装需要的模块
# make && make install 
编译安装

建立软连接(使得python3命令可用)

ln -s /usr/local/python3/bin/python3 /usr/local/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/local/bin/pip3

测试

python3  -V
pip3 -V