Python Functions Tutorial | Built-In, User-Defined, Lambda, Args, Kwargs, Scope, Decorators & More

Python functions are one of the most important foundations of clean code — and this video breaks them down step-by-step. If you want to truly understand Python functions, this lesson walks you from beginner basics all the way to advanced concepts in one structured guide.

You’ll learn how built-in, user-defined, and lambda functions work, plus how to use positional, keyword, default, and variable-length parameters like *args and *kwargs. We also cover return values, local vs global scope, higher-order functions, closures, recursion, decorators, docstrings, and type hints — all explained with clear Python examples so you can actually apply them in real projects.

Whether you're new to Python or reviewing fundamentals before moving into more advanced coding, this tutorial will help you write cleaner, reusable, and more maintainable programs. By the end, you’ll understand how functions organize your code, improve readability, and power real-world Python applications.

If this lesson helped you level up your Python skills, hit Like, subscribe for more practical coding tutorials, and comment below with the next Python topic you want covered!

👉 What you’ll learn:
✅ Function Types: Built-in, User-defined, Lambda
✅ Function Parameters: Positional, Keyword, Default, *args, **kwargs
✅ Return Values: Single & Multiple
✅ Variable Scope: Local vs Global
✅ Advanced Concepts: Higher-Order Functions, Closures, Nested Functions, Recursion
✅ Decorators, Docstrings, and Type Hints

Follow along with the Jupyter Notebooks and code examples linked in the description below!
Repo: https://gitlab.com/MadTcTutorials/python/basic-python
Basic Python Numbers: https://www.youtube.com/watch?v=g91ZGVyWC9A
Basic Python Dictionary: https://www.youtube.com/watch?v=Hlwm7bN5X8A
Basic Python Strings: https://www.youtube.com/watch?v=CZHjD3Jwvp0

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🌐 GitLab
Extra resources & tutorials: https://gitlab.com/MadTcTutorials

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⏱️ Chapters
00:00 Intro and Definition
01:31 Agenda
06:30 Types of Functions
10:15 Function Parameters
15:30 Variable-Length Arguments
20:13 Return Values
24:18 Scope and Lifetime of Variables
27:37 Higher-Order Functions
30:56 Closures and Nested Functions
33:49 Recursion
36:30 Decorators
39:39 Docstrings and Type Hints
43:00 Closure
42:48 Like and Subscribe

Видео Python Functions Tutorial | Built-In, User-Defined, Lambda, Args, Kwargs, Scope, Decorators & More канала MadTc Tech