store data for search using python

[Thomas Thomas]

Hi all,

I have files & text associated with that files as data. what will be the best 
way to store them(like xml..), So that i can search in the text and get a 
list of files as result from a python application..

what kind of factors do i have to take into account if 
my prime concern is effective search.

Another suggestion was btree.. any more tips on that

regards
Thomas