CentOS7安装Python3

su root进入root账户

1.安装依赖包（首先安装gcc编译器，通过gcc --version 查看，没安装的先安装：yum -y install gcc）
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 gcc kernel-devel kenel-headers make bzip2 gcc-c++ zlib zlib-devel libffi-devel

2.下载安装包
wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tgz

3.解压
tar -zxvf Python-3.6.5.tgz

4.创建安装目录
mkdir /usr/local/python3

5.执行配置文件，编译安装，安装完成没有提示错误便安装成功了
cd Python-3.6.5
./configure --prefix=/usr/local/python3
make //编译
make install //安装

6.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

7.测试一下python3是否可以用
[root@mini Python-3.7.0]# python3
Python 3.7.0 (default, Jul 28 2018, 22:47:29)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux
Type “help”, “copyright”, “credits” or “license” for more information.

print(“hello world!”)
hello world!

exit()
[root@mini Python-3.7.0]# pip3 --version
pip 10.0.1 from /usr/local/python3/lib/python3.7/site-packages/pip (python 3.7)

另一个参考博文
http://www.manongjc.com/article/7504.html
https://www.bbsmax.com/A/kvJ3YYbpdg/
https://blog.youkuaiyun.com/lzw17750614592/article/details/87920593?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.channel_param
https://www.cnblogs.com/yangzhaon/p/11203395.html