重新构造此生成器以生成嵌套列表的已排序嵌套元组

def nested_tuple_generator(depth, length):
    if depth == 0:
        yield ()
    else:
        for i in range(length):
            for nested_tuple in nested_tuple_generator(depth - 1, length):
                yield tuple(sorted((i,) + nested_tuple))

for nested_tuple in nested_tuple_generator(3, 4):
    print(nested_tuple)

(0, 0, 0)
(0, 0, 1)
(0, 0, 2)
(0, 0, 3)
(0, 1, 1)
(0, 1, 2)
(0, 1, 3)
(0, 2, 2)
(0, 2, 3)
(0, 3, 3)
(1, 1, 1)
(1, 1, 2)
(1, 1, 3)
(1, 2, 2)
(1, 2, 3)
(1, 3, 3)
(2, 2, 2)
(2, 2, 3)
(2, 3, 3)
(3, 3, 3)