python for loop random

lst = ['mylist1','mylist2','mylist3']
for x in lst:
    for r in xrange(2):
        print x

Output:( repeat element from list twice )

[root@localhost ~]# python test.py
mylist1
mylist1
mylist2
mylist2
mylist3
mylist3

how to random element to :

mylist3
mylist1
mylist3
mylist2
mylist2
mylist1