sudo apt-get install python2.7 python2.7-dev sudo apt-get install python3
命令:html
python 默认执行python2 python2 执行python2 python3 执行python3
参考:java
http://www.cnblogs.com/luckyalan/p/6703590.htmlpython
https://www.zhihu.com/question/21653286python2.7