Python modules are files containing Python code that can define functions, classes, and variables. You can import modules using the 'import' statement, allowing you to reuse code and organize your projects effectively.

Python modules play a vital role in organizing and structuring code in a manageable way. A module is essentially a file containing Python code that can define functions, classes, and variables, enabling developers to encapsulate functionality in a reusable manner. The use of modules promotes code reusability and helps in maintaining clean, organized codebases, especially in larger projects. To use a module, you can import it into your script using the import statement, which allows you to access its functions and classes. For example, if you have a module named math_utils.py that contains a function add_numbers(), you can import it in your main script with import math_utils and call the function as math_utils.add_numbers(). Python also supports importing specific functions or classes from a module using the from keyword, making it easier to access only the necessary components. Additionally, Python's standard library includes a plethora of built-in modules covering various functionalities, such as math, datetime, and os, which can be readily utilized in your projects. Creating your own modules can further enhance your workflow; by structuring your code into modules, you can isolate functionality, making it easier to test and maintain. Understanding how to effectively use modules is fundamental for any Python developer, as it lays the groundwork for building scalable and efficient applications.