Data Format Python Packages

pynwb

A Python API for working with Neurodata stored in the NWB Format

toonify

Toonify: Compact data format reducing LLM token usage by 30-60%

chepy

Chepy is a python lib/cli equivalent of the awesome CyberChef tool.

geoh5py

Python API for geoh5, an open file format for geoscientific data

toon-llm

Token-Oriented Object Notation (TOON) is an LLM-optimized data serialization format implemented in Python.

weldx

The welding data exchange format

stof

Run AI-generated logic safely, inside your app. Stof is JSON with functions: a sandboxed, embeddable runtime for Rust, JavaScript/WebAssembly, and Python.

altopelago-aeon

AEON is a canonical, addressable document language designed so parsers can validate, reference, and cryptographically verify structure before objects are materialized.

langflow-toon

🎒 Token-Oriented Object Notation (TOON) – compact, human-readable serialization of JSON data for LLM prompts. TypeScript SDK, CLI, benchmarks.

rete-graph

Put an RDF graph in one file. Drop it on a URL. Query it with SPARQL, no database server.

dems

:truck: DESHIMA Measurement Set

hissbytenotation

Library to make it easy to use python literal syntax as a data format

flask-responsebuilder

Implementations of flask response in many formats like: json, xml, html...

concrete

Python modules and scripts for working with Concrete, a data serialization format for NLP

mira-omf

Python library for working with OMF files, with conversion between OMF and GEOH5 files

demerge

:truck: DESHIMA merge code for observed datasets

pst-format

Command-line tool and a Python package for parsing Plain Structured Text (PST)

midmanstudio-mdix

Config, code, and encryption in one `.mdix` file. Monorepo for the DixScript compiler: dixscript (Rust core, on crates.io), mdix-cli, mdix-lsp, and FFI bindings for C#, Go, Python, WASM, and C.

las-geoh5

Import/Export LAS files to/from GEOH5 format for geoscientific data

ison-py

🔥 Token-efficient JSON alternative for LLMs & agentic AI — same data, fewer tokens. Python · JS/TS · Rust · Go · C++

irisdb

Ship the decoder with the data. Self-decoding datasets in Rust, with WebAssembly decoders that any engine can run.

tsdf

A package to read, modify and write TSDF data in Python.

spss-converter

A simple utility that converts SPSS data to / from Pandas DataFrames, CSV, Excel, JSON, YAML, and dict.

ensight-reader

A pure Python reader for the EnSight Gold format