The Secret to Cleaner Python Code: Mastering Functions and Closures(Python Core in Action 9)
Learn how to write cleaner, more efficient Python code with functions, nested functions, and closures. Simplify your code and improve readability with these essential techniques.
Welcome to the "Python Core in Action" Series
In real work and life, I've seen many beginners write Python programs with hundreds of lines of code but without a single function. They just pile everything up sequentially, making the code hard to read and prone to errors.
A well-structured Python program, unless it's very short (e.g., 10 or 20 lines), should be composed of multiple functions. This makes the code more modular and organized. Functions are an essential part of Python programs.
In fact, we’ve already used many built-in Python functions in previous lessons, such as `sorted()` for sorting a sequence and `len()` for getting the length of a sequence.
In this lesson, we’ll focus on learning how to create custom Python functions.