What is “python3” Package?

Interpreted, interactive, object-oriented programming language
For more details: https://www.python.org/

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install python3.

  brew install python3

Now, use python3!