Custom comparator implementation for sorting array

Custom Comparator.py

import functools

item = [4, 5, 13, 1, 2, 7]


def cmp(a, b):
    if a < b:
        return -1
    elif a == b:
        return 0
    elif a > b:
        return 1


def cmp2(a, b):
    if a[0] < b[0]:
        return -1
    elif a[0] == b[0]:
        if a[1] < b[1]:
            return -1
        elif a[1] == b[1]:
            return 0
        elif a[1] > b[1]:
            return 1
    elif a[0] > b[0]:
        return 1


print(item)
nums_lst = sorted(item, key=functools.cmp_to_key(cmp))
print(nums_lst)


item= [(1,0),(2,51),(2,23),(1,-1)]
print(item)
nums_lst = sorted(item, key=functools.cmp_to_key(cmp2))
print(nums_lst)