Why does Python never add itself to the Windows path?

[WaterWalk]

Ben Sizer wrote:
> I've installed several different versions of Python across several
> different versions of MS Windows, and not a single time was the Python
> directory or the Scripts subdirectory added to the PATH environment
> variable. Every time, I've had to go through and add this by hand, to
> have something resembling a usable Python installation. No such
> problems on Linux, whether it be Mandrake/Mandriva, Fedora Core, or
> Kubuntu. So why is the Windows install half-crippled by default? I just
> rediscovered this today when trying to run one of the Turbogears
> scripts, but this has puzzled me for years now.
>

Well, after Python is installed on a Windows platform, files with
extention ".py" or ".pyw" are automatically associated with python or
pythonw. If a python script is double-clicked or input something like
"sth.py" in the "cmd" box, the python interpreter is automatically
called. I don't see any proplem or inconvenience with this.