I don't have a ref at hand. You could poke him on Discord.

You may want to use B4B's module blocker instead, I think it prohibits these kind of solutions from passing. Include libraries that read from system or http requests while you are at it; req, pip, .. (not sure which ones)

...or just lean back and accept defeat :-D

Or make a whitelist of allowed modules, such as math, functools, itertools, perhaps also numpy. I don't know what's the best option.

is good

OK

You should keep duplicates.

I still don't understand this kata.

- input -> [13, 89, 55, 1, 5, 2, 1, 3, 21, 8, 0, 34], i=6, j=9
- sorted -> [0, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89]
- sum (8,13,21,34) == 76
- ERROR: 76 should equal 47

I also corrected the random test which always returned True.

I have explained that idea in the description - while the forth smallest value is -9, you may sum all the values in the array that are between -9 to 39 (included). Because you have two more values of -9 the sum is 58 and not 76.

See the last example, you need to add two -9s more, 76 - 18 = 58.