#!/usr/bin/env python
import random
ia_db = '/home/users/djuls/fenny/data/ia.db'
def chooseAnswer(text): 
   for answer in open(ia_db):
      keyword, filename = [ x.strip() for x in line.split("->", 1) ]
      if keyword in text:
         return random.choice( open(filename).readlines() ).strip()
   return None

-----
ia.db:
salut -> /home/users/djuls/fenny/data/salut.db
---- 
salut.db:
Salut
Salut, ça va ?
Coucou