Skill490 repo starsupdated 4mo ago

pdf

This Claude Code skill provides comprehensive PDF manipulation capabilities using Python libraries including pypdf for merging, splitting, and rotating pages; pdfplumber for extracting text and tables with layout preservation; and reportlab for generating new PDF documents. Use this skill when Claude needs to process PDF documents programmatically at scale, such as extracting tabular data into spreadsheets, combining multiple PDF files, filling PDF forms, or generating PDF reports.

View source Repository: Claude_skills_zh-CN

Install in Claude Code

Copy

git clone --depth 1 https://github.com/LeastBit/Claude_skills_zh-CN /tmp/pdf && cp -r /tmp/pdf/skills/pdf ~/.claude/skills/pdf

Then start a new Claude Code session; the skill loads automatically.

Definition

SKILL.md

# PDF 处理指南

## 概述

本指南涵盖使用 Python 库和命令行工具进行的基本 PDF 处理操作。有关高级功能、JavaScript 库和详细示例，请参阅 reference.md。如果需要填写 PDF 表单，请阅读 forms.md 并按照其说明操作。

## 快速开始

```python
from pypdf import PdfReader, PdfWriter

# 读取 PDF
reader = PdfReader("document.pdf")
print(f"页数: {len(reader.pages)}")

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

## Python 库

### pypdf - 基本操作

#### 合并 PDF
```python
from pypdf import PdfWriter, PdfReader

writer = PdfWriter()
for pdf_file in ["doc1.pdf", "doc2.pdf", "doc3.pdf"]:
    reader = PdfReader(pdf_file)
    for page in reader.pages:
        writer.add_page(page)

with open("merged.pdf", "wb") as output:
    writer.write(output)
```

#### 拆分 PDF
```python
reader = PdfReader("input.pdf")
for i, page in enumerate(reader.pages):
    writer = PdfWriter()
    writer.add_page(page)
    with open(f"page_{i+1}.pdf", "wb") as output:
        writer.write(output)
```

#### 提取元数据
```python
reader = PdfReader("document.pdf")
meta = reader.metadata
print(f"标题: {meta.title}")
print(f"作者: {meta.author}")
print(f"主题: {meta.subject}")
print(f"创建者: {meta.creator}")
```

#### 旋转页面
```python
reader = PdfReader("input.pdf")
writer = PdfWriter()

page = reader.pages[0]
page.rotate(90)  # 顺时针旋转90度
writer.add_page(page)

with open("rotated.pdf", "wb") as output:
    writer.write(output)
```

### pdfplumber - 文本和表格提取

#### 提取带布局的文本
```python
import pdfplumber

with pdfplumber.open("document.pdf") as pdf:
    for page in pdf.pages:
        text = page.extract_text()
        print(text)
```

#### 提取表格
```python
with pdfplumber.open("document.pdf") as pdf:
    for i, page in enumerate(pdf.pages):
        tables = page.extract_tables()
        for j, table in enumerate(tables):
            print(f"第 {i+1} 页的表格 {j+1}:")
            for row in table:
                print(row)
```

#### 高级表格提取
```python
import pandas as pd

with pdfplumber.open("document.pdf") as pdf:
    all_tables = []
    for page in pdf.pages:
        tables = page.extract_tables()
        for table in tables:
            if table:  # 检查表格是否为空
                df = pd.DataFrame(table[1:], columns=table[0])
                all_tables.append(df)

# 合并所有表格
if all_tables:
    combined_df = pd.concat(all_tables, ignore_index=True)
    combined_df.to_excel("extracted_tables.xlsx", index=False)
```

### reportlab - 创建 PDF

#### 基本 PDF 创建
```python
from reportlab.lib.pagesizes import letter
from reportlab.pdfgen import canvas

c = canvas.Canvas("hello.pdf", pagesize=letter)
width, height = letter

# 添加文本
c.drawString(100, height - 100, "Hello World!")
c.drawString(100, height - 120, "这是用 reportlab 创建的 PDF")

# 添加线条
c.line(100, height - 140, 400, height - 140)

# 保存
c.save()
```

#### 创建多页 PDF
```python
from reportlab.lib.pagesizes import letter
from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, PageBreak
from reportlab.lib.styles import getSampleStyleSheet

doc = SimpleDocTemplate("report.pdf", pagesize=letter)
styles = getSampleStyleSheet()
story = []

# 添加内容
title = Paragraph("报告标题", styles['Title'])
story.append(title)
story.append(Spacer(1, 12))

body = Paragraph("这是报告的正文内容。" * 20, styles['Normal'])
story.append(body)
story.append(PageBreak())

# 第2页
story.append(Paragraph("第2页", styles['Heading1']))
story.append(Paragraph("第2页的内容", styles['Normal']))

# 构建 PDF
doc.build(story)
```

## 命令行工具

### pdftotext (poppler-utils)
```bash
# 提取文本
pdftotext input.pdf output.txt

# 提取文本并保留布局
pdftotext -layout input.pdf output.txt

# 提取指定页面
pdftotext -f 1 -l 5 input.pdf output.txt  # 第1-5页
```

### qpdf
```bash
# 合并 PDF
qpdf --empty --pages file1.pdf file2.pdf -- merged.pdf

# 拆分页面
qpdf input.pdf --pages . 1-5 -- pages1-5.pdf
qpdf input.pdf --pages . 6-10 -- pages6-10.pdf

# 旋转页面
qpdf input.pdf output.pdf --rotate=+90:1  # 将第1页旋转90度

# 移除密码
qpdf --password=mypassword --decrypt encrypted.pdf decrypted.pdf
```

### pdftk（如果可用）
```bash
# 合并
pdftk file1.pdf file2.pdf cat output merged.pdf

# 拆分
pdftk input.pdf burst

# 旋转
pdftk input.pdf rotate 1east output rotated.pdf
```

## 常见任务

### 从扫描的 PDF 提取文本
```python
# 需要安装: pip install pytesseract pdf2image
import pytesseract
from pdf2image import convert_from_path

# 将 PDF 转换为图像
images = convert_from_path('scanned.pdf')

# 对每一页进行 OCR 识别
text = ""
for i, image in enumerate(images):
    text += f"第 {i+1} 页:\n"
    text += pytesseract.image_to_string(image)
    text += "\n\n"

print(text)
```

### 添加水印
```python
from pypdf import PdfReader, PdfWriter

# 创建水印（或加载现有的）
watermark = PdfReader("watermark.pdf").pages[0]

# 应用到所有页面
reader = PdfReader("document.pdf")
writer = PdfWriter()

for page in reader.pages:
    page.merge_page(watermark)
    writer.add_page(page)

with open("watermarked.pdf", "wb") as output:
    writer.write(output)
```

### 提取图像
```bash
# 使用 pdfimages (poppler-utils)
pdfimages -j input.pdf output_prefix

# 这会将所有图像提取为 output_prefix-000.jpg、output_prefix-001.jpg 等
```

### 密码保护
```python
from pypdf import PdfReader, PdfWriter

reader = PdfReader("input.pdf")
writer = PdfWriter()

for page in reader.pages:
    writer.add_page(page)

# 添加密码
writer.encrypt("userpassword", "ownerpassword")

with open("encrypted.pdf", "wb") as output:
    writer.write(output)
```

## 快速参考

| 任务 | 最佳工具 | 命令/代码 |
|------|-----------|--------------|
| 合并 PDF | pypdf | `writer.add_page(page)` |
| 拆分 PDF | pypdf | 每页一个文件 |
| 提取文本 | pdfplumber | `page.extract_text()` |
| 提取表格 | pdfplumber | `page.extract_tables()` |
| 创建 PDF | reportlab | Canvas 或 Platypus |
| 命令行合并 | qpdf | `qpdf --empty --pages ...` |
| OCR 扫描 PDF | pytesseract | 先转换为图像 |
| 填写 PDF 表单 | pdf-lib 或 pypdf（参见 forms.md） | 参见 forms.md |

## 后续步骤

- 有关 pypdfium2 的高级用法，请参阅 reference.md
- 有关 JavaScript 库（pdf-lib），请参阅 reference.md
- 如果需要填写 PDF 表单，请按照 forms.md 中的说明操作
- 有关故障排除指南，请参阅 reference.md