from functools import cmp_to_key
li = [32, 94, 128, 1286, 6, 71]
def xy_cmp(x, y):
# x 小的话，return 1：需要交换
if x + y < y + x:
return 1
elif x + y > y + x:
return -1
else:
return 0
def number_join(li):
"""数字拼接"""
li = list(map(str, li))
li.sort(key=cmp_to_key(xy_cmp))
return ''.join(li)
