python如何对给定的三个整数，按从小到大排序，用sort语句。

for (num1, num2, num3) in [(-231, -321, 123), (100, 0, -99), (-980, -1002, -1), (6,1,2017)]:
L=[num1,num2,num3]
#这里为什么会出错？如何对给定的三个整数，按从小到大排序，用sort语句。

# -*- coding: UTF-8 -*-
for (num1, num2, num3) in [(-231, -321, 123), (100, 0, -99), (-980, -1002, -1), (6,1,2017)]:
    L=list([num1,num2,num3])
    L.sort()
    print(L)

[-321, -231, 123]
[-99, 0, 100]
[-1002, -980, -1]
[1, 6, 2017]