.python Version !!link!! | 2026 Edition |

: You use the terminal to enter a project folder (e.g., cd my-python-project ).

: While Docker doesn't "read" this file natively, many developers use a script to parse it during the build process to set the FROM python:X.X base image dynamically. Best Practices

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To streamline your configuration further, would you like help writing a , or do you need a complete GitHub Actions workflow template for testing your project? Share public link .python version

Before locking a project to a specific interpreter, ensure it is available locally. pyenv install 3.12.2 Use code with caution. Step 2: Set the Local Version

Should I help you set up pyenv or a specific environment manager to start using this file? What's New In Python 3.11 — Python 3.14.4 documentation

: The most popular tool for installing and switching between isolated Python versions. : You use the terminal to enter a project folder (e

Add to your shell profile ( .zshrc , .bashrc ):

: It ensures every developer on a team uses the exact same Python version, reducing "it works on my machine" bugs.

Alternatively, create it manually using a standard terminal echo command. echo "3.11.2" > .python-version Use code with caution. 4. Verify the Automation This link or copies made by others cannot be deleted

pyenv install 3.13.13

Rye is a modern, unified one-stop shop for Python development created by Armin Ronacher. Rye treats the .python-version file as a first-class citizen to pin toolchains for reproducibility. 4. ASDF / Mise

A .python-version file contains a single string—the version number of Python required for a project (e.g., 3.12.1 ). When you navigate into a folder containing this file, your version manager detects it and instantly switches your active Python interpreter to match that specific version. Why Use It?

Focused heavily on performance improvements (faster Python) and refined typing mechanisms. 5. Installing the Latest Version