pdf

提供 PDF 文档的提取、生成、拆分合并与表单填写等处理指南。

能把 PDF 里的文字和表格抓出来，也能生成新 PDF、拆分合并文件、以及自动填写表单。需要批量处理、程序化生成或分析 PDF 时就会用到，支持用 Python 或命令行脚本跑流程，也有 JavaScript 库示例。特别适合把手工操作自动化、做大规模文档处理和结构化数据提取的场景。

# PDF Processing Guide

## Overview

This guide covers essential PDF processing operations using Python libraries and command-line tools. For advanced features, JavaScript libraries, and detailed examples, see reference.md. If you need to fill out a PDF form, read forms.md and follow its instructions.

## Quick Start

```python
from pypdf import PdfReader, PdfWriter

# Read a PDF
reader = PdfReader("document.pdf")
print(f"Pages: {len(reader.pages)}")

# Extract text
text = ""
for page in reader.pages:
    text += page.extract_text()
```

## Python Libraries

### pypdf - Basic Operations

#### Merge PDFs
```python
from pypdf import PdfWriter, PdfReader

writer = PdfWriter()
for pdf_file in ["