生成两个列表的所有可能组合的一个热矩阵？

def generate_hot_matrix(list1, list2):
    return [[(x, y) for y in list2] for x in list1]

# 示例列表
list1 = [1, 2]
list2 = ['a', 'b', 'c']

# 生成热矩阵
hot_matrix = generate_hot_matrix(list1, list2)

# 打印结果
for row in hot_matrix:
    print(row)

def generate_hot_matrix_generator(list1, list2):
    for x in list1:
        for y in list2:
            yield (x, y)

# 使用生成器
for combination in generate_hot_matrix_generator(list1, list2):
    print(combination)

def generate_filtered_hot_matrix(list1, list2, condition):
    return [[(x, y) for y in list2 if condition(x, y)] for x in list1]

# 示例过滤条件：只保留x和y的和大于3的组合
def condition(x, y):
    return x + ord(y) - ord('a') + 1 > 3

filtered_hot_matrix = generate_filtered_hot_matrix(list1, list2, condition)
for row in filtered_hot_matrix:
    print(row)