随机数想加PYTHON

import itertools
list1=[14140,13260,14300,14500,14040,13940,13620,13980,17280,13580,13740]
mylist = list(itertools.permutations(list1,4))
a=set()
for i in mylist:
    ii=sum(i)
    if ii==59400:
        iii=tuple(sorted(list(i)))   
        a.add(iii)
print(a)