1.添加python3.6安装包,并且安装

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

2.修改系统默认python版本为3.6

cd /user/bin
rm python
ln -s python3.6m python

3.升级pip版本

python pip install --upgrade pip