Learn how to automatically remove unused Python packages from your virtual environment by generating an accurate requirements.txt with pipreqs and enforcing clean dependencies on every commit using a pre‑commit hook, improving build size, speed, and security.
This guide explains how to automatically collect all third‑party modules used in a Python project—by manually inspecting imports or using tools such as pipreqs, Poetry, or pipdeptree to generate a requirements.txt file—and provides a Python script for extracting the first‑line comments from each .py file and saving them to a text file.
This guide explains two methods for creating a Python project's requirements.txt file—using pip freeze within a virtualenv and using the pipreqs tool to automatically scan source code—highlighting their commands, advantages, and the need for manual verification of the generated dependencies.
