树莓派4B 安装卸载pip、pip3

下载get-pip.py：

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

安装：

#查看默认python命令指向版本
ls -l /usr/bin/python*
lrwxrwxrwx 1 root root       7 Mar  4  2019 /usr/bin/python -> python2
lrwxrwxrwx 1 root root       9 Mar  4  2019 /usr/bin/python2 -> python2.7
lrwxrwxrwx 1 root root       9 Mar 26  2019 /usr/bin/python3 -> python3.7

#安装pip for python2.7
sudo python2 get-pip.py

#安装pip for python3
sudo python2 get-pip.py

卸载pip for python2.7：
python2 -m pip uninstall pip setuptools wheel
卸载pip for python3
python3 -m pip uninstall pip setuptools wheel