def split_chunks(lst, n):
n = max(1, n)
return (lst[i:i + n] for i in range(0, len(lst), n))
print(list(split_chunks(range(15, 90), 10)))
'''
run:
[range(15, 25), range(25, 35), range(35, 45), range(45, 55), range(55, 65), range(65, 75), range(75, 85), range(85, 90)]
'''