Installing Python on Ubuntu
First, update your system:
sudo apt-get update
Install python prerequisite
sudo apt-get install build-essential libpq-dev libssl-dev openssl libffi-dev zlib1g-dev
Installing Pip3 and Python3
sudo apt-get install python-pip python3-pip python3-dev -y
Configuring Python 3 as default
python --version pip --version
If the version is not Python3 or Pip3, we have to set the system to run Python3 and Pip3 by default. The very simple way is to use alias.
cd sudo nano ~/.bashrc
Paste this at the top and save it.
alias python=python3
Then run this:
source ~/.bashrc python --version
You should have Python version 3.
Configuring Pip 3 as default
Edit bashrc
cd sudo nano ~/.bashrc
Paste this on the top:
alias pip='pip3'
Run this command to take effect:
source ~/.bashrc
Finally check your version:
pip --version