pyrxiv

pyrxiv is a Python package for retrieving arXiv papers, storing their metadata in pydantic-like classes, and optionally filtering some of them out based on the specific content of the papers (matching a regex pattern).

While originally developed for the Strongly Correlated Electron Systems community in Condensed Matter Physics (cond-mat.str-el), it's designed to be flexible and applicable to any arXiv category.

Install the core package:

pip install pyrxiv

Objective

pyrxiv main objective is to provide an easy command line interface (CLI) to search and download arXiv papers which contain a specific content string matched against a regex pattern. By default, the arXiv PDFs are downloaded. You can optionally save metadata to HDF5 files. You can use the CLI and print the options after installing the package using:

pyrxiv --help

or directly:

pyrxiv search_and_download --help

For example, to download PDFs:

pyrxiv search_and_download --category cond-mat.str-el --regex-pattern "DMFT|Hubbard" --n-papers 5

Or to also save metadata to HDF5 files:

pyrxiv search_and_download --category cond-mat.str-el --regex-pattern "DMFT|Hubbard" --n-papers 5 --save-hdf5

Note: When using --regex-pattern, the tool will continue fetching papers from arXiv until it finds the specified number of papers (--n-papers) that match the pattern. Papers that don't match the regex are automatically discarded.

Documentation

For a comprehensive guide on how to use the CLI and recommended pipelines, see the How to Use pyrxiv documentation.

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Development

To contribute to pyrxiv or run it locally, follow these steps:

Clone the Repository

git clone https://github.com/JosePizarro3/pyrxiv.git
cd pyrxiv

Set Up a Virtual Environment

We recommend Python ≥ 3.10:

python3 -m venv .venv
source .venv/bin/activate

Install Dependencies

Use uv (faster than pip) to install the package in editable mode with dev extras:

pip install --upgrade pip
pip install uv
uv pip install -e .[dev]

Run tests

Use pytest with verbosity to run all tests:

python -m pytest -sv tests

To check code coverage:

python -m pytest --cov=pyrxiv tests

Code formatting and linting

We use Ruff for formatting and linting (configured via pyproject.toml).

Check linting issues:

ruff check .

Auto-format code:

ruff format .

Manually fix anything Ruff cannot handle automatically.