apt-get update
apt-get install python3-distutils
apt-get install python 3.7.3
安裝pip：
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python get-pip.py
更改默認python
python -V #查看當前默認版本
echo "alias python='/usr/local/bin/python3'" >> ~/.bashrc #剛剛編譯安裝目錄
source ~/.bashrc
python -V #確認是否已切換成功