[Tutor] comparison function/built-in needed

[R. Alan Monroe]

> I am attempting to compare the items in two lists across two criteria - 
> membership and position. For example:

> list_a = [ 0, 4, 3, 6, 8 ]
> list_b = [ 1, 8, 4, 6, 2 ]

> Membership = There are 3 items that are common to both lists, that is 3 
> items in list_a have membership in list_b (viz: 4, 6, 8);
> Position = There is 1 item in list_a that is also in the same position 
> in both lists (viz: 6).

Not sure if this will help, but take a look at Levenshtein Distance:
http://www.merriampark.com/ld.htm

Alan