lcc2json 1.0.0

Creates a JSON file of the Library of Congress Classification system

Library of Congress Classifcation to JSON

lcc2json outputs a single JSON file of the Library of Congress Classification system.

For input, it downloads 699 .json files, 14 megabytes in total, from the Library of Congress.

Install

Install from PyPI:

pip install lcc2json

Or install from main source repo, such as:

git clone https://spacecruft.org/books/lcc2json
cd lcc2json/
python -m venv venv
source venv/bin/activate
pip install -U setuptools pip wheel
pip install -e .

Usage

Thusly.

Download the source JSON files from the Library of Congress

lcc2json-dl

Parse the downloaded JSON files and output a single JSON file:

lcc2json

Help

Download script help:

$ lcc2json-dl --help
usage: lcc2json-dl [-h] [-o OUTPUT_DIR] [-v] [--dry-run]

Download Library of Congress Classification JSON files from id.loc.gov

options:
  -h, --help            show this help message and exit
  -o, --output-dir OUTPUT_DIR
                        Output directory for JSON files (default: json)
  -v, --verbose         Enable verbose logging
  --dry-run             Show what would be downloaded without actually downloading

Examples:
  lcc2json-dl                     # Download all classifications to ./json/
  lcc2json-dl -o lcc_data         # Download to ./lcc_data/
  lcc2json-dl -v                  # Verbose output
  lcc2json-dl --dry-run           # Show what would be downloaded

Output JSON script help:

$ lcc2json --help
usage: lcc2json [-h] [-i INPUT_DIR] [-o OUTPUT] [-v] [--ranges]

Extract LCC outlines from downloaded JSON files.

options:
  -h, --help            show this help message and exit
  -i, --input-dir INPUT_DIR
                        Directory containing JSON files (default: json)
  -o, --output OUTPUT   Output file path (default: lcc.json)
  -v, --verbose         Enable verbose output
  --ranges              Include start/stop/prefix range fields in output (larger file size)

📄 License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

Copyright © 2025 Jeff Moe