python实现pdf的页面替换

利用第三方库PyPDF2，下面例子中进行的是将 origin.pdf 的第17页替换为 s17.pdf 的第1页：

import PyPDF2

def replace_pages(original_pdf_path, replacement_pages):
    with open(original_pdf_path, 'rb') as original_file:
        original_pdf = PyPDF2.PdfReader(original_file)
        output_pdf = PyPDF2.PdfWriter()

        for page_num in range(len(original_pdf.pages)):
            if page_num == 16:  # Replace page 17 with first page of s17.pdf
                with open(replacement_pages['s17'], 'rb') as replacement_file:
                    replacement_pdf = PyPDF2.PdfReader(replacement_file)
                    output_pdf.add_page(replacement_pdf.pages[0])
            else:
                output_pdf.add_page(original_pdf.pages[page_num])

        with open('output.pdf', 'wb') as output_file:
            output_pdf.write(output_file)

# 定义要替换的页面和其对应的替换文件
replacement_pages = {
    's17': 's17.pdf',
}

replace_pages('origin.pdf', replacement_pages)

可以根据自己的实际需求进行修改。