Learn how to create and use modules in Python , which are files containing definitions and statements that can be imported into other scripts or interactive sessions. See examples of importing, executing, and accessing functions and variables from modules . Python is one of the most popular programming languages because of its vast collection of modules which make the work of developers easy and save time from writing the code for a particular task for their program. Python provides various types of modules which include Python built-in modules and external modules . In this article, we will learn about the built-in modules in Python and how to use them. Learn what a module is in Python , how to create and import user-defined modules , and how to use built- in modules . See examples of functions, classes, variables, and constants in modules . Learn how to create, use and import modules in Python , which are files containing functions and variables for reusable code. See examples of built- in modules , aliasing, dir() function and more.