On some platforms the "python" command doesn't exist by default
(Ubuntu 20.04, OpenBSD), on others it runs Python 2 (macOS). However,
on all of them the command python3 runs a Python 3 interpreter.
I know the installation documentation says to make sure that "python"
points at a Python 3 interpreter, but using python3 seems less likely
to fail.
On some platforms the "python" command doesn't exist by default (Ubuntu 20.04, OpenBSD), on others it runs Python 2 (macOS). However, on all of them the command python3 runs a Python 3 interpreter.
I know the installation documentation says to make sure that "python" points at a Python 3 interpreter, but using python3 seems less likely to fail.