---
id: pyliblzfse
version: "0.4.1"
license: MIT
license_treatment: permissive
maintenance: abandoned
---

# pyliblzfse — Python bindings for the LZFSE reference implementation

License: permissive · Maintenance: abandoned · Downloads: 130.6K/mo

## What it is and what it does

pyliblzfse is a thin Python wrapper around Apple's LZFSE reference implementation, exposing functions for the LZFSE and LZVN algorithms. It ships with prebuilt wheels for Python 3.7+ on macOS and Windows, eliminating the need for a C compiler on those platforms. The library has no runtime dependencies beyond Python itself, making it lightweight to add to a project. Use it by importing and calling the available functions with byte data, handling the error exception if the operation fails.

The project has been abandoned since its latest release on 2020-07-09, with no commits or updates since then. While there are no known security vulnerabilities, the lack of active maintenance means bug fixes and compatibility updates with newer Python versions are unlikely to be addressed.

Use it for:

- Decompress LZFSE-compressed data from Apple system files or archives in forensic workflows.
- Integrate LZFSE decompression into tools that work with macOS backup or system image formats.
- Work with LZVN-encoded payloads in applications that need Apple's compression standards.
- Validate or inspect LZFSE-compressed data as part of a larger data processing pipeline.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides Python bindings for LZFSE and LZVN compression and decompression using Apple's reference implementation.

Yes, if you need LZFSE or LZVN decompression and are using Python 3.7+ on macOS or Windows. The library is lightweight, has no dependencies, and carries permissive MIT licensing. However, the project is abandoned since 2020-07-09 and no longer maintained—do not expect bug fixes or compatibility updates for future Python versions. For production use, verify that version 0.4.1 works with your target Python version before committing to it.

## Install

pip install pyliblzfse
uv add pyliblzfse
poetry add pyliblzfse

## Installing pyliblzfse

Before you install: Medium install friction due to compiled wheels; prebuilt binaries available for Python 3.7+ on macOS and Windows, but older Python versions or other platforms may require compilation.

License in practice: MIT license permits free use, modification, and distribution with minimal restrictions—suitable for most projects.

Quickstart:

pip install pyliblzfse

import liblzfse

try:
    decompressed = liblzfse.decompress(compressed_data)
except liblzfse.error:
    print('Decompression failed')

Input data must be in LZFSE or LZVN format (typically starting with 'bvx*' or 'bvx$' markers).

Verify before relying:

- Whether compression is supported or only decompression is available.
- Current maintenance status and whether security patches or bug fixes are still being applied.
- Compatibility with Python versions released after 2020.

## Package facts

- License: MIT (permissive)
- Python support: unspecified
- Install friction: medium
- Maintenance: abandoned
- Downloads: 130.6K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

lzfse compression python, lzvn decompression, apple lzfse bindings, data compression library, lzfse decompress, compression, data-format

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