import os

def remove_first_n_lines_from_files(directory, n):
    for filename in os.listdir(directory):
        filepath = os.path.join(directory, filename)
        if os.path.isfile(filepath):
            with open(filepath, 'r+', encoding='utf-8') as file:
                lines = file.readlines()
                # 检查文件的行数是否多于n
                if len(lines) > n:
                    # 删除前n行
                    lines = lines[n:]
                else:
                    # 如果文件行数少于等于n，将其内容清空
                    lines = []

                # 回到文件开头，写入处理后的内容
                file.seek(0)
                file.writelines(lines)
                # 截断文件以删除多余的内容
                file.truncate()

# 示例用法
directory = r'C:\Users\anenvoy\Desktop\notes'  # 修改为你的实际文件夹路径
n = 6  # 要删除的行数
remove_first_n_lines_from_files(directory, n)