如何从文本文件中删除嵌套列表中单个列表元素中的空格？[已解决]

import re

def remove_spaces_from_nested_list(file_path):
    # 读取文本文件
    with open(file_path, 'r') as file:
        text = file.read()

    # 解析文本文件为嵌套列表
    nested_list = eval(re.sub(r'(\[.*?\])', r'"\1"', text))

    # 删除空格函数
    def remove_spaces(lst):
        if isinstance(lst, list):
            return [remove_spaces(elem) for elem in lst]
        else:
            return lst.replace(' ', '')

    # 删除空格
    nested_list = remove_spaces(nested_list)

    # 重新组装为文本格式
    text = str(nested_list)

    # 写入文本文件
    with open(file_path, 'w') as file:
        file.write(text)

# 示例调用
remove_spaces_from_nested_list('input.txt')