Python is available for several operating systems and architecture combinations. These guides are focused on Python 3 only.
The easiest way to install Python 3 on Windows is to use the official Python 3 Installer.
You can download the installer file (.exe) by opening the following link on a Windows PC.
https://www.python.org/ftp/python/3.8.2/python-3.8.2-amd64.exe
When running the installer make sure to check the box that says Add Python 3.6 to PATH.
After that you should choose Customize Installation. Make sure your custom installation settings are the same as the following images.
Once Python 3 has finished installing you will be able to run Python 3 scripts by opening a Command prompt and typing the name of the file.
Assuming we have a simple Python 3 file on our desktop named myscript.py:
cd c:\Users\(username)\Desktop
python myscript.py
You can also double click .py files and they will automatically start a Python interpreter and begin executing the code until it finishes.
The easiest way to install Python 3 on OSX and macOS is to use the package manager Homebrew.
Open a terminal window and enter the following commands:
brew update
brew install python3
If you don't have Homebrew installed you can install it by entering the following command in a terminal:
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Once Python 3 has installed, you can verify it is correctly linked to your PATH by using the following command:
python3 --version
The easiest way to install Python 3 on Ubuntu is by using the built in package manager.
Open a terminal window and enter the following commands:
sudo apt-get update
sudo apt-install python3
sudo apt-get install python3-pip
Once Python 3 has installed, you can verify it is correctly linked to your PATH by using the following command:
python3 --version