如何在带标签的pdf中获取标签的页码

import PyPDF2

def get_tag_page_numbers(pdf_file):
    tag_page_numbers = {}

    with open(pdf_file, 'rb') as file:
        pdf_reader = PyPDF2.PdfFileReader(file)

        for page_number in range(pdf_reader.numPages):
            page = pdf_reader.getPage(page_number)
            if '/Tabs' in page:
                tags = page['/Tabs']
                for tag in tags:
                    tag_name = tag['/Title']
                    tag_page_numbers[tag_name] = page_number + 1

    return tag_page_numbers

pdf_file = 'example.pdf'
tag_page_numbers = get_tag_page_numbers(pdf_file)

for tag, page_number in tag_page_numbers.items():
    print(f"标签名称：{tag}，页码：{page_number}")