The .python-version file is a small but essential configuration file used by popular Python version managers like pyenv and asdf. Its primary role is to specify which version of Python should be automatically activated when you enter a specific project directory. Why Use a .python-version File?
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 .python version
When you run python inside a directory, pyenv looks for a .python-version file in the current directory, then parent directories, until it reaches your home folder. If none exists, it falls back to the global version (set via pyenv global). Should I help you set up pyenv or
.python-version file?At its core, a .python-version is a plain text file (usually placed in the root of a Python project) that contains a single line—the name or version number of the Python interpreter your project expects. Verify the installation:
Verify the installation:
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