docker 内升级Python 3.5 到3.6

sudo apt-get install software-properties-common
sudo add-apt-repository ppa:jonathonf/python-3.6
sudo apt-get update
sudo apt-get install python3.6

运行命令1，报错

bash: sudo: command not found

解决办法

apt-get update
apt-get install sudo

再次运行命令1，报错

Cannot add PPA: 'ppa:~jonathonf/ubuntu/python-3.6'.

更换命令为

sudo add-apt-repository ppa:deadsnakes/ppa

执行命令3 - 4

sudo apt-get update
sudo apt-get install python3.6

2. 删除python3.5的pip

   apt-get remove python3-pip
   apt-get autoremove
   

3. 安装python3.6版本的pip

   apt-get install python3-pip
   rm /usr/bin/python3
   ln -s /usr/bin/python3.6 /usr/bin/python3
   python3.6 -m pip install --upgrade pip
   

4. 查看python版本

   pip -V