gistfile1.txt

def deepest_array(array, index):
    sub_array = array[index[0]]
    for component in index[1:-1]:
        sub_array = sub_array[component]
    return sub_array

def get_val(array, index):
    return deepest_array(array, index)[index[-1]]

def set_val(array, index, value):
    deepest_array(array, index)[index[-1]] = value

array = [
    [1, 2, 3],
    [4, 5, 6],
]

index = (1, 1)

print get_val(array, index)
# prints 5

set_val(array, index, 50)
print get_val(array, index)
# print 50