I forgot about that one earlier :-/
Duplicate: https://www.codewars.com/kata/56aed5db9d5cb55de000001c

TS transalation

Instead of running 100 random tests like the js version i did it so it tests every matrix size from 1 to 64.

In python it's almost impossible to forbid something:

int (s)
type(0)(s)
getattr(__builtins__, 'i' 'nt')(s)
reduce(lambda n,d: n*10+ord(d)-48, s, 0)
eval(s)
...

str (n)
f'{n}'
repr(n)
'%d' % n
type('')(n)
getattr(n, '__s' 'tr__')()
'{0}'.format(n)
...

P.S. there is a similar kata (obviously without python).