marri

def diagonalDifference(arr):
    sum_1 = 0
    sum_2 = 0
    result = 0
    for i in col:
        for j in row:
            if(i == j):
                sum_1 += arr[i][j]
                sum_2 += arr[i][len(arr)-1-i]
    if(sum_1 > sum_2):
        return sum_1 - sum_2
    else:
        return sum_2 - sum_1