NB question on global/local variables in functions

[Wolfgang]

Hi all,

I've started to write some functions but I have some problems with 
common variables in that functions.

So I have some variables which should be accessible by all my functions 
but not accessible by the rest of my code. How can I do this?

Thanks
Wolfgang

###function.py:

c1=123.0
c2=134.0

def fun(temp):
	return temp+c1-c2

def fun1(temp):
	return temp-c1


### caller.py
from function import *
	print fun(10.0)
	print c1