[python]ubuntu下的python2和python3

在终端分别输入python，python2，python3 python和python2默认都是python2 python3才是python3

Ubuntu下是默认没有pip的，需要自己手动安装

sudo apt install python-pip #安装python2的pip sudo apt install python3-pip # 安装python3的pip

pip list #查看python2下的pip安装包 pip3 list #查看python3下pip安装包