On Mon, Apr 12, 2010 at 1:05 PM, vsoler <vicente.so...@gmail.com> wrote: > Hi everyone, > > say that 'db' is a list of values > say 'i' is a list of indexes > I'd like to get a list where each item is i-th element of db. > > For example: > > db=[10,20,30,40,50,60,70,80,90] #undefined length > i=[3,5,7] #undefined length > then result=[30,50,70] # resulting list > > how can I do this?
result = [db[k-1] for k in i] # your indices seem to be 1-based See "List comprehensions": http://docs.python.org/tutorial/datastructures.html#list-comprehensions Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
