hive.pdf

1# PDF Processing Guide
2 
3## Overview
4 
5This guide covers essential PDF processing operations using Python libraries and command-line tools. For advanced features, JavaScript libraries (pdf-lib, pdfjs-dist), pypdfium2 details, performance tips, and troubleshooting, see REFERENCE.md.
6 
7## Quick Start
8 
9```python
10from pypdf import PdfReader, PdfWriter
11 
12# Read a PDF
13reader = PdfReader("document.pdf")
14print(f"Pages: {len(reader.pages)}")
15 
16# Extract text
17text = ""
18for page in reader.pages:
19    text += page.extract_text()
20```
21 
22## Python Libraries
23 
24### pypdf - Basic Operations
25 
26#### Merge PDFs
27```python
28from pypdf import PdfWriter, PdfReader
29 
30writer = PdfWriter()
31for pdf_file in ["doc1.pdf", "doc2.pdf", "doc3.pdf"]:
32    reader = PdfReader(pdf_file)
33    for page in reader.pages:
34        writer.add_page(page)
35 
36with open("merged.pdf", "wb") as output:
37    writer.write(output)
38```
39 
40#### Split PDF
41```python
42reader = PdfReader("input.pdf")
43for i, page in enumerate(reader.pages):
44    writer = PdfWriter()
45    writer.add_page(page)
46    with open(f"page_{i+1}.pdf", "wb") as output:
47        writer.write(output)
48```
49 
50#### Extract Metadata
51```python
52reader = PdfReader("document.pdf")
53meta = reader.metadata
54print(f"Title: {meta.title}")
55print(f"Author: {meta.author}")
56print(f"Subject: {meta.subject}")
57print(f"Creator: {meta.creator}")
58```
59 
60#### Rotate Pages
61```python
62reader = PdfReader("input.pdf")
63writer = PdfWriter()
64 
65page = reader.pages[0]
66page.rotate(90)  # Rotate 90 degrees clockwise
67…