# -*- coding: utf-8 -*-
"""
    @file: tt_sort.py
    @date: 2020-10-20 10:41 AM
"""
import copy
from functools import cmp_to_key


def rule(a, b):
    if a > b:
        return 1
    if a < b:
        return -1
    return 0


L = [7, 4, 8, 2, 9, 6]

L2 = copy.copy(L)

L.sort(key=cmp_to_key(rule))

print(sorted(L2, key=cmp_to_key(rule)))
print(L)
# print(L2)

print(''.join([str(num) for num in L2]))