Python Modules: How to Write Cleaner, Reusable Code

Python modules are .py files containing functions, variables, and classes that can be imported into other scripts, eliminating the need to rewrite repetitive code. Developers can use Python's built-in modules like math, random, and datetime, or create their own custom modules tailored to specific tasks. Modules can be imported using standard import statements, selective imports with 'from...import', or aliases for brevity. Python searches the current project folder, installed packages, and its standard library in order when resolving module imports, raising a ModuleNotFoundError if none is found. Following best practices such as meaningful naming, single-purpose design, and proper documentation helps teams maintain cleaner, more collaborative codebases.