Replace a module variable with a function call

[gabriel.becedillas at gmail.com]

I have a module that defines a variable with a constant value and now I
need to make that value dynamic, without affecting module clients. In
other words, I need to call a function witout using parenthesis.
Example:

mymod.py----------------------

def value():
    return "hi"

client.py--------------------------
import mymod

print mymod.value

Is there a way to do this ?
Thanks.