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---
phase: implementation
title: Implementation - PDF Extractor
description: Technical implementation notes for PDF extraction.
---
# Implementation Guide
## Code Structure
**How is the code organized?**
- `pdf_to_epub/core/pdf_extractor.py`
## Implementation Notes
**Key technical details to remember:**
### PyMuPDF Usage
```python
import fitz
doc = fitz.open(path)
for page in doc:
text = page.get_text("text", sort=True)
```
Setting `sort=True` is vital for correct reading order.
### Paragraph Joining
PDF text often has extra newlines. We should join lines that end without "sentence-ending" punctuation or lines that look like parts of the same flow.
## Error Handling
**How do we handle failures?**
- Catch `fitz.FileDataError` for corrupted files.
- Catch `RuntimeError` for encrypted files without password.
