I created all three PDFs and checked them. The one oddity is that the bullet characters in terms.pdf come out as (cid:127) when extracted.
Files (in the working folder, built by scripts/make.py, checked by scripts/check.py):
invoice.pdfis 1 page. It has a title for "Northwind Sample Co" and three line items, and everything is marked as sample.terms.pdfis 1 page. It has the heading "Sample Terms" and three bullet terms.combined.pdfis 2 pages, with the invoice first and the terms second. That matches 1 + 1 pages.
Text extracted from combined.pdf
- Page 1 has the invoice title, the "fictional / made-up sample data" note, the table rows, and the "SAMPLE - not a real invoice." footer.
- Page 2 has "Sample Terms" and the three terms: payment due in 30 days, 1% monthly late fee, and goods remaining sample property until paid. Each one is marked "(sample term)".
Table extracted from page 1 (one table found):
| Item | Qty | Unit Price | Amount |
|---|---|---|---|
| Sample Widget | 10 | $5.00 | $50.00 |
| Sample Gadget | 2 | $25.00 | $50.00 |
| Sample Service Hour | 4 | $30.00 | $120.00 |
| Total | $220.00 |
Verification: The line items add up: 50 + 50 + 120 = 220, which matches the stated total. The extracted table has the same 5 rows and 4 columns I built, with no merged or missing cells.
Problem: pdfplumber reads the bullet glyph as (cid:127) instead of "•". That is how the built-in Helvetica font encodes the bullet, so it is probably an extraction quirk and the bullets should display normally. I haven't rendered the pages, so I can't confirm how they look. If clean extracted text matters to you, I can switch to a plain "-" marker.
Test run: two sample one-page PDFs built with reportlab, merged with pypdf, then read back with pdfplumber, in a temporary folder. The run was allowed to write files and run python3 only. I re-opened the files myself: 1 + 1 pages merged into 2, and the table text matched. The model flagged that the bullet glyph extracts as (cid:127). Pages were not rendered, so appearance was not checked. All content is sample.
它做什么
使用三个常见的库：pypdf 处理结构（合并、拆分、调整顺序、旋转、表单、元数据），pdfplumber 提取文字和表格，reportlab 生成新的 PDF。它先检查每个输入文件（页数、尺寸、是否加密、表单字段，以及每页能提取多少文字，借此尽早发现扫描页），再执行任务，并重新打开每个输出，核对页数、文字样本、表单值和文件大小。它会报告没有可提取文字的页面，说明需要 OCR，并在提取出的表格可能不可靠时给出提醒。它只在你提供密码、且你有权使用该文件时打开受保护的 PDF，不会尝试破解保护。
输出
新的 PDF 文件和生成它们的脚本、改动了什么、核对结果，以及发现的问题，比如扫描页或缺少字体。
适合什么场景
合并和拆分文档，从报告里提取表格，加水印和页码，填写表单，生成简单的发票或报告。
中风险：纯指令文件，自身没有脚本，但它会编写并运行 Python，在你的工作目录里创建文件，也可能建议在虚拟环境里安装 pypdf、pdfplumber 和 reportlab。它不会覆盖你的原文件，也不会破解密码保护。已在临时目录用示例 PDF 试用一次：生成了两份 PDF、合并并正确提取了表格；项目符号在提取时变成了 (cid:127)，并且没有渲染页面，所以外观没有检查。AIBars 原创（MIT）。