ubuntu18.04 install pip
1. environment
release version: bionic
kernel version:4.15.0-29-generic
2.install pip
2.1 sudo apt-get install python3-distutils (resolve a problem:ImportError:cannot import name 'sysconfig')
2.2 wget https://bootstrap.pypa.io/get-pip.py
2.3 sudo python3 get-pip.py