python自动化脚本安装指定版本python环境详解

#!/usr/bin/python#coding:utf-8'''date:9/2/17 18:03 PMauthor:lockeyemail:lockey@123.comdesc:python自动化安装用户指定版本的python环境'''#导入Python的系统编程操作模块import os#导入用来处理Python运行时配置以及资源，与前当程序之外的系统环境交互的模块import sys#判断当前用户是否是root用户if os.getuid() == 0:  passelse:  print 'Not under root mode, please switch user!'  sys.exit(1)#获取用户输入的python安装版本version = raw_input('Please input wanted python version(2.7/3.6)')#如果嫌官网下载速度太慢可以指定python3.6.2的链接地址为本人上传资源地址#根据用户输入的python版本选择源码包下载地址if version == '2.7':  url = 'https://www.python.org/ftp/python/2.7.13/Python-2.7.13.tgz'elif version == '3.6':  url = 'https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tgz'else:  print 'Please input given version number(2.7/3.5)'  sys.exit(1)#拼接源码包下载地址并执行下载命令cmd = 'wget ' + urlres = os.system(cmd)if res != 0 :  print 'Failed to download python source package, please inspect your network!'  sys.exit(1)if version == '2.7':  package_version = 'Python-2.7.13'else:  package_version = 'Python-3.6.2'#解压下载的源码包cmd = 'tar xf ' + package_version + '.tgz'res = os.system(cmd)#如果解压失败则删除下载的源码包并且提示用户重新执行脚本if res != 0:  os.system('rm ' + package_version + '.tgz')  print 'Please reexcute the script to install python'  sys.exit(1)#解压成功则进入解压后的源码目录中依次执行配置、编译、安装过程cmd = 'cd ' + package_version + ' && ./configure --prefix=/usr/local/python && make && make install'res = os.system(cmd)#安装失败则提示用户安装失败了，让用户检查环境依赖if res != 0:  print 'Failed to install python, please inspect dependencies for python install!'  sys.exit(1)