In this tutorial, you'll learn how and when to use the len() Python function. You'll also learn how to customize your class definitions so that objects of a user-defined class can be used as arguments in len().| realpython.com
The Zen of Python is a list of 19 guiding principles for good programs. Understand its purpose, history, and hidden jokes to improve your code today!| realpython.com
In this tutorial, you'll learn the key characteristics of lists and tuples in Python, as well as how to define and manipulate them. When you're finished, you'll have a good feel for when to use a tuple vs a list in a Python program.| realpython.com
