What is a Python module and how do you use it?

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A Python module is a file containing Python definitions and statements, typically saved with a .py extension. It allows you to organize and reuse code across different Python programs. Modules can contain functions, classes, variables, and runnable code, which can then be imported into other scripts for use.

How to use a Python module:

1. Importing a Module: You can import a module into your script using the import statement. This imports the entire math module, allowing you to access its functions, such as sqrt() for square roots.

2. Import Specific Functions or Classes: Instead of importing the entire module, you can import only the specific functions or classes you need.

3. Renaming Imports: You can alias a module or function to give it a shorter or more convenient name.

4. Creating Your Own Module: You can create your own modules by saving Python code in a file with a .py extension (e.g., my_module.py). Then, import and use it in another script:

5. Standard Library and External Libraries: Python comes with a rich standard library of built-in modules (like math, os, sys, etc.), but you can also install and use external modules via package managers like pip.

By organizing code into modules, you promote reusability, maintainability, and better structure in your projects.

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