The executables are organised as follows: Manager such as pyenv if you require stability of minor or patch versions for virtual environments.
Homebrew provides a formula for Python 3.x ( Python may be upgraded to a newer version at any time. Important: If you choose to use a Python which isn’t either of these two (system Python or brewed Python), the Homebrew team cannot support any breakage that may occur. Homebrew provided a formula until the end of 2019, at which point it was removed due to the Python 2 deprecation. Homebrew provides formulae to brew Python 3.x. Homebrew should work with any CPython and defaults to the macOS system Python. See Python for Formula Authors for advice on writing formulae to install packages written in Python.
This page describes how Python is handled in Homebrew for users.