Skill: Python3 Virtual Environments (venv)

Purpose

Manage project-local Python 3 virtual environments under .venv with clear, repeatable steps.

When to use

• Any task in a Python project, including running scripts, tests, or tools
• Repos containing pyproject.toml, requirements.txt, setup.py, setup.cfg, Pipfile, poetry.lock, or *.py
• Setting up a fresh Python environment
• Installing or updating dependencies
• Exporting or locking dependencies
• Repairing or recreating a broken environment

Activation guidance

• If a task involves executing Python code or tooling, ensure .venv exists and is activated first.
• If .venv is missing, create it and install dependencies before running the task.