sys.platform documentation?

[Michiel Sikma]

Hello everybody,

I was thinking about making a really insignificant addition to an  
online system that I'm making using Python: namely, I would like it  
to print the platform that it is running on in a human-readable  
manner. I was thinking of doing it like this:

import sys

platforms = {
	'darwin': 'Darwin',
	'win32': 'Microsoft Windows',
	'freebsd6': 'FreeBSD 6.0'
}

def version():
	return '%s, running on %s.' % (NAME, platforms[sys.platform])

However, in order to populate the list of platforms, I need to know  
which strings sys.platform can return. I haven't found any  
documentation on this, but I guess that I'm not looking in the right  
places! Do any of you know where I can find a list of possible return  
values from sys.platform? I'll settle for a Python C source code  
file, too, if it contains strings.

Regards,

Michiel