question about class, functions and scope

[nephish]

lo there all,

i have an app that runs three classes as threads in the same program.
some of them need to be able to share some functions. Can i set a
function before i define a class and have the class use it ? Kinda like
this.

def some_function(var1, var2):
    do something with var1, var2
    return result

class do_something1(threading.Thread):
    def __init__(var):
        do something
    def run():
        var1 = 3
        var2 = 4
        result = some_function(var1,var2)

is this legal ? is it pythonic?
i ask because i plan to do a big re-write soon, and want to get rid of
some repetition

thanks