"py" command for Linux and Mac?

[MRAB]

On 2022-05-12 17:25, Dan Stromberg wrote:
> Hi folks.
> 
> I heard there's a Windows-like "py" command for Linux (and Mac?).
> 
> I'm finally getting to porting a particular project's Python 2.7 code to
> 3.x, and one of the first steps will probably be changing a lot of "python2
> script.py" to use #!/usr/bin/env python2 and chmod +x.  Then we can update
> the scripts one at a time to use #!/usr/bin/env python3.
> 
> However, would this be Linux-and-Mac-only?  I'm not at all sure this code
> will ever move to Windows, but in case it does, would a "py" command work
> on all 3 if I use #!/usr/bin/env py?
> 
> And if so, where can I find that "py" command for Linux and Mac?
> 
> I tried searching for it in Google and on Pypi, but unsurprisingly
> searching for "py" gives a buzzillion hits on other things.
> 
It's called the "Python Launcher"; you'll get more helpful results if 
you search for that.