Thanks Diez for your suggestion, I'll look around to find out more about the seek function ( i learnt python 2 weeks ago and I do not have a programmer background, but so far, I am doing well).
Peter, I cannot really process as your advice : it is not that stereotypical entries....we built a data structure for the xml and we report various types of events, always under the same format but with different contents types. The script i am writing aims at picking only special events ( identified by a route tag and an information tag). Anyway, thank you for your advices!! -- http://mail.python.org/mailman/listinfo/python-list
