ubuntu 升级python3.6

1,先下载

sudo apt-get install software-properties-common python-software-properties 

2，现在先安装python3.6，然后软连接换成python3.6

1. sudo add-apt-repository ppa:jonathonf/python-3.6
2.sudo apt-get update
  sudo apt-get install python3.6

3.sudo apt install spyder3
4.sudo rm /usr/bin/python
5.sudo ln -s /usr/local/bin/python3.6 /usr/bin/python

3,python版本默认python3

alias python='/usr/bin/python3.6'
一旦完成以上操作，重新登录或者重新加载 .bashrc 文件，使操作生效。
$ . ~/.bashrc