ThePythonBook

Functions

Define functions, arguments, scope, recursion, and higher-order functions

6tutorials

36exercises

145minutes

510XP

6 tutorials in this category

Python Functions: Define, Call, and Return Values

Learn to define and call Python functions, use parameters and return values, understand scope basics, and write reusable code with real-world examples.

beginner25m680

Python *args, **kwargs, Default Values, and Keyword Arguments

Master Python function arguments — positional, keyword, default values, *args, **kwargs. Learn flexible function signatures used in real Python libraries.

intermediate25m7105

Python Lambda Functions: When to Use (and When Not To)

Master Python lambda functions — anonymous one-line functions. Learn lambda syntax, use with sorted(), map(), filter(), and know when regular functions are better.

intermediate20m570

Python Variable Scope, Closures, and the LEGB Rule

Understand Python variable scope — local, enclosing, global, built-in (LEGB). Learn closures, the global and nonlocal keywords, and avoid common scope bugs.

intermediate25m570

Python Recursion: How It Works, When to Use It, and Examples

Master Python recursion — understand the call stack, base cases, and recursive patterns. Learn factorial, Fibonacci, and real-world recursive algorithms.

intermediate25m685

Python map(), filter(), reduce(), and Higher-Order Functions

Master Python\

intermediate25m7100

Data Structures Error Handling