CSV:如何从列表列表(包含列表的列表)中找到最匹配/最接近的值？

import math

def find_closest_value(target, nested_list):
    closest_value = None
    min_difference = math.inf

    for sublist in nested_list:
        for value in sublist:
            difference = abs(value - target)
            if difference < min_difference:
                min_difference = difference
                closest_value = value

    return closest_value

# 示例用法
nested_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
target_value = 5.5
closest_value = find_closest_value(target_value, nested_list)
print(f"最接近的值为：{closest_value}")