python, How we can do it?

Question

How we can make a program to output this:
[[1,1,1,1], [1,1,1,2],...., [2, 2, 2, 1], [2, 2, 2, 2]]
using function that call itself, and list with python.

and, what is the correct way for this code?

https://code.sololearn.com/cZdM9X1R6ZYD/?ref=app

Answer 1

Your task definition is not fully clear. Do you want to get all possible combinations of 1 and 2 in a list that contains 4 elements?

If you want to implement it with recursion, you need to think about the base case.
Your function could start with a list (the outside container) that has an empty list inside.
Each step of the recursion would add one element, either 1 or 2, to the inner list. So with each step, the number of lists in your container would double up, and their length would grow by one.
You reach the base case, when the size of the inner lists is 4.

There can be other correct ways to do this, it is just my approach :)
https://code.sololearn.com/cdpx5q7uL4mO/?ref=app