mathieu wrote: > Hi there, > > I am trying to write something very simple to test if a list > contains another one: > > a = [1,2,3] > > b = [3,2,1,4] > > but 'a in b' returns False. How do I check that a is indeed contained > in b ? Use sets: >>> a = [1,2,3] >>> b = [3,2,1,4] >>> set(a).issubset(set(b)) True Christian