4.3.2 Custom Modules

A custom module is a Python file containing reusable code.
Creating custom modules helps organize functionality and reduce duplication.

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Creating a Custom Module

A custom module:

• Is a .py file
• Contains functions, variables, or classes
• Can be imported into other files

Modules promote separation of concerns in larger projects.

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Using Custom Modules

• Place the module in an accessible directory
• Import it using standard import syntax
• Reuse its functionality across files

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📌 Note:
Modular design improves code organization and long-term maintainability.