python compare list elements with each other code example

Example 1: compare lists element wise python

[ x&y for (x,y) in zip(list_a, list_b)]

Example 2: python compare each item of one list

import itertools
for a, b in itertools.combinations(mylist, 2):
    compare(a, b)

Example 3: how to make every item compare the rest items of list in python

for i in range(len(mylist)):
    for j in range(i + 1, len(mylist)):
        compare(mylist[i], mylist[j])