https://realpython.com/courses/defining-python-functions-with-optional-arguments/

Defining your own functions is an essential skill for writing clean and effective code. In this tutorial, you’ll explore the techniques you have available for defining Python functions that take optional arguments. When you master Python optional arguments, you’ll be able to define functions that are more powerful and more flexible.

In this course, you’ll learn how to:

Distinguish between parameters and arguments

Define functions with optional arguments and default parameter values

Define functions using args and kwargs

Deal with error messages about optional arguments