Modularity in programming refers to the practice of dividing a software program into separate, interchangeable modules, each of which contains everything necessary to execute only one aspect of the desired functionality. Python, with its emphasis on readability and simplicity, is particularly well-suited for modular programming.

Benefits of Modularity

• Reusability : Functions or classes defined in a module can be reused in multiple parts of a program.

• Namespace Separation : Modules help avoid conflicts in function names, variable names, etc.

• Maintainability : Smaller, modular pieces of code are easier to manage and debug.

To begin learning about modularity in Python, we'll focus on understanding and using functions effectively.