python编程，把一个整数list分成两个list，要求两个(list里整数总和)之差值最小

#!/usr/bin/env python
#-*- encoding: utf-8 -*-
from itertools import compress, imap
def fun(lst):
    min_number = 100000000
    length = len(lst)
    total = 2**length
    record = None