环境：
sudo cat /proc/version
#Linux version 5.4.72-microsoft-standard-WSL2 (oe-user@oe-host) (gcc version 8.2.0 (GCC)) #1 SMP Wed Oct 28 23:40:43 UTC 2020
适用于Python 3的Pip3：
sudo apt update
sudo apt install python3-venv python3-pip
查看版本：
pip3 --version
#pip 18.1 from /usr/lib/python3/dist-packages/pip (python 3.7)