Module 5 Overview
Module 5: Functions marks the transition from writing linear scripts to building structured applications. Functions allow us to break down complex problems into smaller, manageable, and reusable pieces.
In this module, we will explore the syntax of defining functions, the flexibility of Python’s argument system, the rules governing variable visibility (scope), and the concise power of lambda functions.
Learning Objectives
Section titled “Learning Objectives”By the end of this module, you will be able to:
- Define and call Functions to eliminate code repetition.
- Master the difference between Parameters and Arguments.
- Utilize Keyword Arguments and default values for flexible APIs.
- Handle arbitrary numbers of arguments using
*argsand**kwargs. - Understand the LEGB Rule (Local, Enclosing, Global, Built-in) to avoid scope-related bugs.
- Write concise Lambda Functions for on-the-fly operations.
Module Contents
Section titled “Module Contents” Defining Functions The anatomy of a function: def, return, and docstrings.
Arguments & Parameters Positional, keyword, default, and variadic arguments.
Scope & Lifetime Understanding where variables live and die (LEGB Rule).
Lambda Functions Anonymous, single-expression functions.