initializing modules?

[Corrado Gioannini]

hi all, 
i have some general functions that i want to be used within different
modules. those functions are defined when i launch the main script
(they depend on some parameters read from a configfile, whose name is passed
on the command line).
i'd like to put them in a separate module to be imported from the other
modules, but i need to 'initialize' them when i run the main script.
how can i approach this problem in a better way?

here's a simplified version of the problem:

--------main.py----------
t = 'long text read from config file '

def f(s):
    return t+s

from modA import classA

a = classA().methodA()
print a
-------------------------

--------modA.py----------
class classA:
    def __init__(self):
        self.txt = 'plus other things'
    def methodA(self):
        return 'method A returns %s. hope you like" % f(self.txt)
-------------------------

of course this won't work beacuse f will not be found in modA
i could do something like:

class classA:
    def __init__(self,g):
        self.f = g['f']
        self.txt = 'plus other things'

in modA.py and then call

a = classA(globals()).methodA()

inside main.py. but this is very ugly imho. and i should replicate it for
different functions and lots of classes.

so i thougth that the best thing should be to put the definition of f in a
modF.py, and then put a "from modF import *" line at the beginning of each
module, like modA, which uses it... 
if only i could do something like a 'module initialization'. 
at this point i realized there was something wrong in my approach :)

(ah, i cannot just read the configfile inside modF, because inside main.py i
do some computation using configfile's parameters before defining the
functions. to do all this just once is my aim.)

thanks for your help.
Corrado.
-- 

Corrado Gioannini
<gioco at nekhem.com>

"Thought is only a flash between two long nights,
                                         but this flash is everything."
                                                          (H. Poincaré)