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Extract PDF Text

提供使用 PyMuPDF(fitz)从本地 PDF 提取文本的规则与代码示例,支持纯文本、dict/JSON 结构化输出,并对扫描件给出 pytesseract OCR 回退思路;附带示例、OCR 设置与故障排查文档。全部处理在本地完成,不调用外部 API,不修改原文件。

ivangdavila
ivangdavila
热度 86.63
最近更新 2026-05-11 17:26:18
分类:效率依赖:代码执行 / 读写文件应用场景:文件转换 / 数据处理

安装技能

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执行命令安装此 skill: npx secure-skills-cli add extract-pdf-text
Metadata
name
Extract PDF Text
slug
extract-pdf-text
version
1.0.2
homepage
https://clawic.com/skills/extract-pdf-text
description
Extract text from PDF files using PyMuPDF. Parse tables, forms, and complex layouts. Supports OCR for scanned documents.
changelog
Remove internal build file that was accidentally included
metadata
{"clawdbot":{"emoji":"📄","requires":{"bins":["python3"],"pip":["pymupdf"]},"os":["linux","darwin","win32"],"install":[{"id":"pymupdf","kind":"pip","package":"PyMuPDF","label":"Install PyMuPDF"}]}}

When to Use

Agent needs to extract text from PDFs. Use PyMuPDF (fitz) for fast local extraction. Works with text-based documents, scanned pages with OCR, forms, and complex layouts.

Quick Reference

Topic File
Code examples examples.md
OCR setup ocr.md
Troubleshooting troubleshooting.md

Core Rules

1. Install PyMuPDF First

pip install PyMuPDF

Import as fitz (historical name):

import fitz  # PyMuPDF

2. Basic Text Extraction

import fitz

doc = fitz.open("document.pdf")
text = ""
for page in doc:
    text += page.get_text()
doc.close()

3. Pick the Right Method

PDF Type Method
Text-based page.get_text() — fast, accurate
Scanned OCR with pytesseract — slower
Mixed Check each page, use OCR when needed

4. Check for Text Before OCR

def needs_ocr(page):
    text = page.get_text().strip()
    return len(text) < 50  # Likely scanned if very little text

5. Handle Errors Gracefully

try:
    doc = fitz.open(path)
except fitz.FileDataError:
    print("Invalid or corrupted PDF")
except fitz.PasswordError:
    doc = fitz.open(path, password="secret")

Extraction Traps

Trap What Happens Fix
OCR on text PDF Slow + worse accuracy Check get_text() first
Forget to close doc Memory leak Use with or doc.close()
Assume page order Wrong reading flow Use sort=True in get_text()
Ignore encoding Garbled characters PyMuPDF handles UTF-8

Scope

This skill provides instructions for using PyMuPDF to extract PDF text.

This skill ONLY:

  • Gives code examples for PyMuPDF
  • Explains OCR setup when needed
  • Troubleshoots common issues

This skill NEVER:

  • Accesses files without user request
  • Sends data externally
  • Modifies original PDFs

Security & Privacy

All processing is local:

  • PyMuPDF runs entirely on your machine
  • No external API calls
  • No data leaves your system

Output Formats

Plain Text

text = page.get_text()

Structured (dict)

blocks = page.get_text("dict")["blocks"]
for b in blocks:
    if b["type"] == 0:  # text block
        for line in b["lines"]:
            for span in line["spans"]:
                print(span["text"], span["size"])

JSON

import json
data = page.get_text("json")
parsed = json.loads(data)

Full Example

import fitz

def extract_pdf(path):
    """Extract text from PDF, with OCR fallback for scanned pages."""
    doc = fitz.open(path)
    results = []
    
    for i, page in enumerate(doc):
        text = page.get_text()
        method = "text"
        
        # If very little text, might be scanned
        if len(text.strip()) < 50:
            # OCR would go here (see ocr.md)
            method = "needs_ocr"
        
        results.append({
            "page": i + 1,
            "text": text,
            "method": method
        })
    
    doc.close()
    return {
        "pages": len(results),
        "content": results,
        "word_count": sum(len(r["text"].split()) for r in results)
    }

# Usage
result = extract_pdf("document.pdf")
print(f"Extracted {result['word_count']} words from {result['pages']} pages")

Feedback

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