pdf

提供全面的 PDF 读取、抽取、合并、拆分与表单操作指南。

处理所有 PDF 相关工作：读取、抽取文本和表格、合并或拆分、旋转页面、加水印、填写表单、加解密、提取图片并对扫描件做 OCR 变成可搜寻文本。只要提到 .pdf 或需要生成/修改 PDF 文件就能用，既能做批量自动化也支持细粒度编辑。

# 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 ["