如何从多个文件中获得平均最后写入时间？

import os
import time

def get_average_last_write_time(file_list):
    total_write_time = 0
    file_count = 0

    for file_path in file_list:
        try:
            # 获取文件最后修改时间
            last_write_time = os.stat(file_path).st_mtime
            total_write_time += last_write_time
            file_count += 1
        except FileNotFoundError:
            print(f"文件 '{file_path}' 不存在")
        except Exception as e:
            print(f"读取文件 '{file_path}' 发生错误: {str(e)}")

    if file_count > 0:
        average_last_write_time = total_write_time / file_count
        return average_last_write_time
    else:
        return None

# 文件列表
file_list = ["path/to/file1.txt", "path/to/file2.txt", "path/to/file3.txt"]

# 获取平均最后写入时间
average_time = get_average_last_write_time(file_list)
if average_time is not None:
    print(f"平均最后写入时间: {time.ctime(average_time)}")
else:
    print("没有找到文件或文件列表为空")