How do i install Python software on my laptop

Answer 1

Assuming you're on Windows, download the installer from the official site, run it and follow the steps on the installation Wizard.
https://www.python.org/downloads/

Answer 2

Assuming you're on desktop Linux (Debian, *buntu, Manjaro, RHEL, etcetera), it's usually pre-installed. I think on Mac, too. Otherwise use your package manager. And remember "python" may point to Python 2, not 3, so run "python3 <file>.py" if you're running both.