infinite_shuffle.py

def random_items(lst):
    lst = lst[:] # copy so original list is not mutated
    while True:
        random.shuffle(lst)
        yield from lst
        
 # Python 2 can't use `yield from`
def random_items_py2(lst):
    lst = lst[:]
    while True:
        random.shuffle(lst)
        for i in lst:
            yield i