【Tech】 Install Python/pip on Ubuntu 20.04

Installation

Replace python2 with python3:

python --version 
sudo apt install software-properties-common
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt update
sudo apt install python3.8
python --version 
which python3
sudo apt install python-is-python3

Updated March 2022

其实可以直接跑这个，安装最新版 python （as of this writing, latest stable is v3.9.2）:

sudo apt install python3 python3-pip

Got:

chrx@penguin:~/$ python3 --version
Python 3.9.2
chrx@penguin:~/$ pip --version 
pip 20.3.4 from /usr/lib/python3/dist-packages/pip (python 3.9)

Reference: https://www.how2shout.com/linux/install-python-3-x-or-2-7-on-debian-11-bullseye-linux/

pip

To install pip on python3:

python --version 
pip
pip3
sudo apt install python3-pip
pip
pip --version 

Now you have python3 and pip installed on Ubuntu.