I am making a code (game) where I need to randomize the number of rows (length) in a number array each time it’s generated. What I mean is that when a new array is generated, I want the length of that array to be random, like in the first print to be 7, another print to be 4, etc.

For my code, i need to make different columns with a row of random numbers, which i got, but am having troubles with seperating the rows into each column. I cannot use Numpy as part of my task