.python Version __hot__ Jun 2026

: Open your editor, type 3.12.1 (or your desired version), and save as .python-version .

Always commit the .python-version file to your Git repository. This ensures that every developer, CI/CD pipeline, and automated testing suite uses the exact same Python runtime. Stick to Semantic Versioning

pip freeze > requirements.txt

Check if the setup was successful. The shell should reflect your specified local build, even if your global machine default is different. python --version # Output: Python 3.12.2 Use code with caution. Best Practices: Source Control and CI/CD

Declares dependency requirements and package metadata (e.g., requires-python = ">=3.10" ). pip , poetry , uv , hatch .python version

The .python-version file only handles the Python binary. Combine it with a dependency lockfile—like requirements.txt , Pipfile.lock , or poetry.lock —to ensure absolute environment reproducibility. Troubleshooting Common Issues The Version Does Not Switch Automatically

pyenv-win also respects .python-version . Run: : Open your editor, type 3

: Ensures everyone on your team uses the exact same Python version. Portability