CentOS7环境搭建python3以及与python2实现共存的方法

# 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

# wget https://www.python.org/ftp/python/3.4.2/Python-3.4.2.tgz# mkdir /usr/local/python3# tar -zxvf Python-3.4.2.tgz# cd Python-3.4.2# ./configure --prefix=/usr/local/python3# make && make install# ln -s /usr/local/python3/bin/python3 /usr/bin/python3

# python3Python 3.4.2 (default, Jul 19 2016, 03:47:32)[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linuxType "help", "copyright", "credits" or "license" for more information.>>>

#!/usr/bin/python3# 第一个注释print ("Hello, Python3!")执行# python3 hello.pyHello, Python3!