Centos7中安装python3

1.安装必要的编译工具和环境

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

1. 下载安装包

下载地址：https://www.python.org/downloads/source/
下载tg包：

1. 编译安装

   # tar -zxvf Python-3.6.1.tgz
   # cd Python-3.6.1
   # ./configure --prefix=/usr/local/python3
   # make && make install
   

2. 创建软连接

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

3. 验证是否成功

   [root@prod-see ~]# python3 -V
   Python 3.8.9
   

4. 运行python项目（打包的python项目）

注意事项：

1. python是yum的默认解释器，如果直接替换源python会导致yum无法使用
2. 直接用软连接到/usr/local/bin/python3，而不是/usr/bin/python3