Py.exe Guide

: You can specify which version to run directly from the command line. For instance, running py -3.10 will launch that specific version, while py alone defaults to the most recent version installed.

To effectively use the launcher, you can utilize several built-in flags: py Launches the latest installed version of Python. py -0p Lists all installed Python versions and their file paths. py -3.x Launches a specific major/minor version (e.g., py -3.11 ). py -m pip py.exe

The launcher solves a common problem on Windows: having several versions of Python (e.g., 3.10 and 3.12) installed simultaneously and needing to switch between them without manually changing system environment variables. : You can specify which version to run

: The launcher can read "shebang" lines (e.g., #! /usr/bin/python3 ) at the top of scripts. Even though Windows doesn't natively support this Unix feature, py.exe interprets it to launch the correct environment. Common Commands for py.exe py -0p Lists all installed Python versions and

: py.exe is typically installed in C:\Windows\ , which is always included in the Windows system PATH. This ensures the py command works instantly after installation, even if you didn't check the "Add Python to PATH" box during setup.