Creating variables in a class definition

[Tage Stabell-Kulo]

Here is how I would like to globally suck in the environment, and then
use that throughout the modules; notice the way I derive from DEMO so
that I can use self.ROOT.


class DEMO:
	# Here are the variables we want to update
	var = { "PATH" : "/bin", "ROOT" : "/var" }
	for i in in a.keys():
		tmp = os.getenv(i)
		if tmp:
			a[i] = tmp
	# Create variables
	PATH = var["PATH"]
	ROOT = var["ROOT"]

class DoIt(DEMO):
	def __init__(self):
		os.chdir(self.ROOT)

The problem with this that the variables in DEMO are named twice; it 
is a ticking bomb waiting for someone to add one in the dictionary and
forgetting to create a variable for it.

The question: How to I create variables (from a dictionaly in this
case) in the class as I initialize?

I known getattr will do it for me, but if I use getattr in
DEMO have I not inhibited myself from using getattr in DoIt (or
ended up with even more complexity than I had in the first place)?

Yours cincerely,

	[TaSK]