5. Mastering Data with None: When a Value Isn't There
   In Python, there's no exact equivalent of a "null" value like in some other programming languages. However, Python provides the None object to represent the absence of a meaningful value
6. Safeguarding Your Python Code: Mastering Attribute Checks with Confidence
   Classes and Objects in PythonIn Python, a class is a blueprint that defines the properties (attributes) and behaviors (methods) of objects
7. Exploring Iteration in Python: Generators, Classes, and Beyond
   Iterators vs. IterablesIn Python, iterators and iterables are closely related concepts:Iterables: These are objects that you can loop over using a for loop
8. Calling Functions by Name Strings in Python: Unveiling Dynamic Execution
   Here's a breakdown of how it works:Here's an example to illustrate the concept:In this example:We define a Math class with an add function
9. Beyond the Basics: Exploring Advanced Attribute Handling in Python
   Python provides the built-in function setattr to achieve this. It takes three arguments:object: The object you want to modify