Linux

Most recent Linux distributions come with Python 3.4+ preinstalled. You can check this out by typing python3 in the terminal. If Python 3 is installed, you should see the following message, which shows more information about the version:

Python 3.4.3 (default, Nov 17 2016, 01:08:31) [GCC 4.8.4] on Linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 

If Python 3 is not installed, you can install it on a Debian-based OS, such as Ubuntu, by running the following commands in the terminal:

sudo apt update
sudo apt install Python3 build-essential

The build-essential package contains compilers that are useful for building non-pure Python packages. You may need to substitute apt with apt-get if you have Ubuntu 14.04 or older.