Part 1. Starting out
These first three chapters tell you a little bit about Python, its strengths and weaknesses, and why you should consider learning Python 3. In chapter 2 you see how to install Python on Windows, macOS, and Linux platforms and how to write a simple program. Chapter 3 is a quick, high-level survey of Python’s syntax and features.
If you’re looking for the quickest possible introduction to Python, start with chapter 3.