Creating n random lists

I'd like to create n random 10-number-lists using python, and put these results in a list.

Below is my code:

from random import shuffle

def gen_random_list (num):
    ran = []
    k = [n for n in range(1, 11)]
    for i in range(num):
        shuffle(k)
        ran.append(k)
    return ran 

The expected output should be something like:

[[4, 3, 10, 2, 8, 5, 7, 9, 6, 1],
[1, 3, 9, 6, 10, 4, 2, 8, 5, 7],
[4, 1, 3, 2, 9, 7, 8, 5, 6, 10]]

However, when I ran it in jupyter notebook, I got this:

[[4, 1, 3, 2, 9, 7, 8, 5, 6, 10],
[4, 1, 3, 2, 9, 7, 8, 5, 6, 10],
[4, 1, 3, 2, 9, 7, 8, 5, 6, 10]]

Which is just the repeatings of last random list.

screenshot in jupyter notebook

Could someone tell me where the problem is?

Thanks.