注意事项：
1、非root帐号加上sudo
2、centos7自带Python 2.7.5是不能卸载的，很多系统级软件依赖这个
安装依赖
# 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
下载python3，我的是Python-3.4.3.tgz
# wget https://www.python.org/ftp/python/3.4.3/Python-3.4.3.tgz
# mkdir /usr/local/python3
# tar -zxvf Python-3.4.3.tgz
# cd Python-3.4.3
# ./configure --prefix=/usr/local/python3
# make && make install
# ln -s /usr/local/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3
测试
查看版本
# python3
Python 3.4.3 (default, Jul 19 2017, 19:29:17)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>> exit()
[root@paas-02 Python-3.4.3]#
代码测试
在当前目录新建个python脚本hello.py
内容:
#!/usr/bin/python3
# 第一个注释
print ("Hello, Python3!")
执行
# python3 hello.py
Hello, Python3!
