How to generate a list of arrays by iterating?

Question

Python

The bottom line: there is an array of elements. You need to output them to a file as a list of arrays of 5 elements:
mass = ['1','2','3','4','5','6','7','8']

['1','1','1','1','1']
['1','1','1','1','2']
['1','1','1','1','3']
...
['1','1','1','2','1']
...

Answer 1

from itertools import product

for e in product([1, 2, 3], repeat=2):
    print(e)

change the data to your own, output even to a file, even into space.