The fastar library wraps the Rust tar, flate2, and zstd crates, providing a high-performance way to work with compressed and uncompressed tar archives in Python.

pip install fastar

This section shows basic examples of how to create and extract tar archives using Fastar. For more usage examples, please refer directly to the test cases in the tests directory.

import fastar
from pathlib import Path


input_file = Path("file.txt")
input_file.write_text("Hello, Fastar!")


with fastar.open("archive.tar", "w") as archive:
    archive.append(input_file)


with fastar.open("archive.tar", "r") as archive:
    archive.unpack("output/")


unpacked_file = Path("output/file.txt")
print(unpacked_file.read_text())  # Hello, Fastar!

The fastar.open method supports the following modes:

1. Install dependencies into a virtual env: uv sync
2. Make changes to the code and tests
3. Build the package: uv run maturin develop
4. Run the tests: uv run pytest