cpython/PC/launcher-usage.txt

Python Launcher for Windows Version %s

usage:
%s [launcher-args] [python-args] [script [script-args]]

Launcher arguments:
-2     : Launch the latest Python 2.x version
-3     : Launch the latest Python 3.x version
-X.Y   : Launch the specified Python version

The above default to an architecture native runtime, but will select any
available. Add a "-32" to the argument to only launch 32-bit runtimes,
or add "-64" to omit 32-bit runtimes (this latter option is deprecated).

To select a specific runtime, use the -V: options.

-V:TAG         : Launch a Python runtime with the specified tag
-V:COMPANY/TAG : Launch a Python runtime from the specified company and
                 with the specified tag

-0  --list       : List the available pythons
-0p --list-paths : List with paths

If no options are given but a script is specified, the script is checked for a
shebang line. Otherwise, an active virtual environment or global default will
be selected.

See https://docs.python.org/using/windows.html#python-launcher-for-windows for
additional configuration.

The following help text is from Python: