How to get the list of selected items in DP 0-1 knapsack? (Python)

Question

I've seen this implementation of printing the list of items in a 0-1 knapsack, but it's not memoized. I would like to know how to implement the code used in the link using the following dynamic programming code:

def knapSack(W, wt, val, n):
    K = [[0 for x in range(W + 1)] for x in range(n + 1)]
 
    # Build table K[][] in bottom up manner
    for i in range(n + 1):
        for w in range(W + 1):
            if i == 0 or w == 0:
                K[i][w] = 0
            elif wt[i-1] <= w:
                K[i][w] = max(val[i-1]
                          + K[i-1][w-wt[i-1]], 
                              K[i-1][w])
            else:
                K[i][w] = K[i-1][w]
 
    return K[n][W]
 
 
# Driver code
val = [60, 100, 120]
wt = [10, 20, 30]
W = 50
n = len(val)
print(knapSack(W, wt, val, n))

Explanations of the code insert would be appreciated. Thank you.