These tools create project-specific virtual environments, effectively solving the problem of "dependency hell" that often plagues Python version management. A significant reason for this is that ...

A simple command-line todo application built with Python 3.13+ using Test-Driven Development (TDD) principles. todo-app/ ├── src/ │ └── todo_app/ │ ├── __init__.py │ ├── models.py # Task dataclass │ ...