如何使用python从子目录下的文件名中删除多个字符？

import os

def remove_chars_from_filename(directory, chars):
    for root, dirs, files in os.walk(directory):
        for file in files:
            old_name = os.path.join(root, file)
            new_name = old_name
            for char in chars:
                new_name = new_name.replace(char, "")
            if new_name != old_name:
                os.rename(old_name, new_name)

directory = "子目录路径"
chars_to_remove = ["字符1", "字符2", "字符3"]
remove_chars_from_filename(directory, chars_to_remove)