Python Function Design: Positional-Only and Keyword-Only Parameters

Designing clean, robust Python APIs requires precise control over how arguments are passed to your functions. Without clear boundaries, future changes to parameter names can break your users' code unexpectedly. This text-based course teaches you how to implement positional-only and keyword-only parameters in Python. You will learn to use modern syntax constraints to write safer, self-documenting code that stands the test of time. What you'll learn: 1. Understand the core differences between positional, keyword, positional-only, and keyword-only arguments. 2. Apply the slash syntax to enforce positional-only arguments in your function definitions. 3. Implement the asterisk syntax to require explicit keyword-only arguments. 4. Combine argument constraints with modern Python type hints for maximum code clarity. 5. Design robust APIs that prevent breaking changes when refactoring parameter names. You will start with Python's foundational argument-passing mechanics before diving into advanced syntax constraints. Through clear written explanations and practical code examples, you will learn to structure functions for real-world library development and team collaboration. This course is designed for beginner to intermediate Python developers who want to write more professional, maintainable code. No prior experience with advanced API design is required. Start reading today to elevate your Python function design skills.