Py2PDF PdfFileWriter -拆分文件是附加文件，而不是保存自己的文件

from PyPDF2 import PdfFileReader, PdfFileWriter

# 打开原始PDF文件
with open('original.pdf', 'rb') as original_file:
    reader = PdfFileReader(original_file)
    total_pages = reader.getNumPages()

    # 遍历每一页
    for page_number in range(total_pages):
        # 创建一个新的PdfFileWriter对象
        writer = PdfFileWriter()
        
        # 将当前页添加到writer对象
        writer.addPage(reader.getPage(page_number))
        
        # 创建一个新的PDF文件，文件名为 "page_{}.pdf".format(page_number + 1)
        with open(f'page_{page_number + 1}.pdf', 'wb') as output_file:
            # 将writer对象的内容写入新的PDF文件
            writer.write(output_file)