Python: filtering lists by indices

Question

In Python I have a list of elements aList and a list of indices myIndices. Is there any way I can retrieve all at once those items in aList

Answer 1

If you do not require a list with simultaneous access to all elements, but just wish to use all the items in the sub-list iteratively (or pass them to something that will), its more efficient to use a generator expression rather than list comprehension:

(aList[i] for i in myIndices)