从文本文件中删除或清除一行

def remove_line_from_file(file_path, line_number):
    # 打开文件并读取内容
    with open(file_path, 'r') as file:
        lines = file.readlines()

    # 删除目标行
    if line_number < len(lines):
        del lines[line_number]

    # 创建新文件并写入内容
    with open(file_path + '.new', 'w') as new_file:
        new_file.writelines(lines)

    # 关闭文件
    file.close()
    new_file.close()

    # 替换原始文件
    os.remove(file_path)
    os.rename(file_path + '.new', file_path)

remove_line_from_file('example.txt', 2)