Hi, have anybody a hint , how i get a dict from non unique id's and their different related values. Thanks for advance Chris ###random data # a=range(10)*3 def seqelem(): i=random.randint(0,2) elem=['a','b','c'][i] return elem s=[seqelem() for t in range(30)] print zip(a,s) ## favored result: { '0':'c->c->a' ,'1':'a->b->a' .........}