@guumaster
Anything in the test cases tab of the window on the lower right hand corner of the kata editor runs when warriors click attempt. So for python, you could try something like this:

from random import ... # pick the random methods you want to use

def ref_solution(num_list):
    # the exact same code you used in the complete solution tab of the window on the lower left hand corner

Test.it("Random Tests")
# set your parameters. Maybe a max value, a min length.
max_val = 10000
min_len = 20
for _ in 100:
    num_list = # some function using methods from random to generate a list using parameters above
    test.assert_equals(sort_by_binary_ones(num_list), ref_solution(num_list))