Message From PyUFunc Developers

This section records utility-function packages reviewed by the pyufunc maintainers. The table includes package metadata that can be checked independently: PyPI version badges, PyPI download badges where available, GitHub latest-commit badges, repository links, and package descriptions.

The table supports a limited claim: these packages were part of the review scope for candidate utility functions and optional wrappers. It does not prove that every listed package, or every function selected from those packages, is among the most frequently used in Python projects.

Additional exploratory evidence is stored in datasets/util_pkgs_dependents_func_usage. Those JSON files contain GitHub dependent-repository scan outputs for selected packages. In the current checked-in data, psutil.json records 35 valid function references across 5 dependent repositories, pyhelpers.json records 175 valid function references across 4 dependent repositories, and pyutil.json records 20 valid function references across 13 dependent repositories. The scans can help identify observed usage examples, but they are incomplete because GitHub dependents pages are rate-limited, some repositories are private, and static analysis cannot capture all dynamic usage.

pyufunc adopts only selected functionality and thin wrappers. Source package, repository, documentation, and license information are documented in wrapper docstrings. If attribution or licensing information needs correction, please open a GitHub issue.

Third-party license information for packages wrapped or used by pyufunc optional utilities is maintained in THIRD_PARTY_LICENSES.md.

Tradeoffs

Centralizing utility functions can reduce repeated local helper code in some projects, but it also creates tradeoffs:

• Users may spend time searching a larger API surface before finding the relevant function.
• Optional wrappers may require additional dependencies to be installed.
• Centralized wrappers require ongoing maintenance for attribution, licenses, tests, and compatibility.
• A project-specific helper may be clearer when behavior is narrow, domain-specific, or performance-sensitive.

Candidate Package Metadata

The table below includes the 92 candidate packages listed in AGENTS.md. These packages were reviewed to support better decisions about which optional utility wrappers should be selected for pyufunc, but pyufunc does not include utility functions from every package listed here. Rows are sorted by the latest GitHub commit date available from repository Atom feeds, newest first. The latest-commit column shows the badge only; commit dates were used for sorting when the table was generated. Packages from earlier reviews that are not in the AGENTS candidate list are retained so earlier review work remains visible.

License values come from PyPI package metadata (license_expression, license, or license classifiers) with a small number of documented fallbacks where PyPI metadata is incomplete. The table is review metadata only; wrapper docstrings and THIRD_PARTY_LICENSES.md remain the attribution record for packages actually wrapped or used by pyufunc optional utilities.

Package Name	Latest Version	Downloads	Latest Commit	Repository	License	Description
yarl				GitHub Repo	Apache-2.0	Yet another URL library
typer				GitHub Repo	MIT	Command-line interface builder based on Python type hints.
tox				GitHub Repo	MIT	tox is a generic virtualenv management and test command line tool
sqlalchemy				GitHub Repo	MIT	Database Abstraction Library
scipy				GitHub Repo	BSD	Fundamental algorithms for scientific computing in Python
ruff				GitHub Repo	MIT	An extremely fast Python linter and code formatter, written in Rust.
redis				GitHub Repo	MIT	Python client for Redis database and key-value store
pytest				GitHub Repo	MIT	pytest: simple powerful testing with Python
pymongo				GitHub Repo	Apache-2.0	PyMongo - the Official MongoDB Python driver
pydantic				GitHub Repo	MIT	Data validation using Python type hints
pyarrow				GitHub Repo	Apache-2.0	Python library for Apache Arrow
polars				GitHub Repo	MIT	DataFrame library with lazy and eager query APIs.
platformdirs				GitHub Repo	MIT	A small Python package for determining appropriate platform-specific dirs, e.g. a user data dir.
pandas				GitHub Repo	BSD	Powerful data structures for data analysis, time series, and statistics
optuna				GitHub Repo	MIT	A hyperparameter optimization framework
hypothesis				GitHub Repo	MPL-2.0	The property-based testing library for Python
duckdb				GitHub Repo	MIT	DuckDB in-process database
cvxpy				GitHub Repo	Apache-2.0	A domain-specific language for modeling convex optimization problems in Python.
click				GitHub Repo	BSD-3-Clause	Composable command line interface toolkit
attrs				GitHub Repo	MIT	Classes Without Boilerplate
aiohttp				GitHub Repo	Apache-2.0 AND MIT	Async http client/server framework (asyncio)
urllib3				GitHub Repo	MIT	HTTP library with thread-safe connection pooling, file post, and more.
tomlkit				GitHub Repo	MIT	Style preserving TOML library
structlog				GitHub Repo	MIT OR Apache-2.0	Structured Logging for Python
pypdf				GitHub Repo	BSD-3-Clause	A pure-python PDF library capable of splitting, merging, cropping, and transforming PDF files
pulp				GitHub Repo	MIT	PuLP is an LP modeler written in python. PuLP can generate MPS or LP files and call GLPK, COIN CLP/CBC, CPLEX, and GUROBI to solve linear problems.
numpy				GitHub Repo	BSD-3-Clause AND 0BSD AND MIT AND Zlib AND CC0-1.0	Fundamental package for array computing in Python
networkx				GitHub Repo	BSD-3-Clause	Python package for creating and manipulating graphs and networks
filelock				GitHub Repo	MIT	A platform independent file lock.
dask				GitHub Repo	BSD-3-Clause	Parallel PyData with Task Scheduling
scikit-image				GitHub Repo	BSD	Image processing in Python
coverage				GitHub Repo	Apache-2.0	Code coverage measurement for Python
pyutilities				GitHub Repo	MIT	PyUtilities :: Useful python 3+ utilities library for various use cases.
pillow				GitHub Repo	MIT-CMU	Python Imaging Library (fork)
fsspec				GitHub Repo	BSD-3-Clause	File-system specification
pathspec				GitHub Repo	MPL-2.0	Utility library for gitignore style pattern matching of file paths.
loguru				GitHub Repo	MIT	Python logging library with a preconfigured logger API.
tenacity				GitHub Repo	Apache-2.0	Retry code until it succeeds
pyutils				GitHub Repo	Apache-2.0	Python Utilities
more-itertools				GitHub Repo	MIT	More routines for operating on iterables, beyond itertools
humanize				GitHub Repo	MIT	Python humanize utilities
psutil				GitHub Repo	BSD-3-Clause	Cross-platform lib for process and system monitoring.
python-dateutil				GitHub Repo	Apache-2.0 / BSD	Extensions to the standard Python datetime module
requests				GitHub Repo	Apache-2.0	HTTP client library for Python.
websockets				GitHub Repo	BSD-3-Clause	An implementation of the WebSocket Protocol (RFC 6455 & 7692)
requests-cache				GitHub Repo	BSD-2-Clause	A persistent cache for python requests
glom				GitHub Repo	BSD	A declarative object transformer and formatter, for conglomerating nested data.
pendulum				GitHub Repo	MIT	Python datetimes made easy
dynaconf				GitHub Repo	MIT	The dynamic configurator for your Python Project
cattrs				GitHub Repo	MIT	Composable complex class support for attrs and dataclasses.
imageio				GitHub Repo	BSD-2-Clause	Read and write images and video across all major formats. Supports scientific and volumetric data.
smart-open				GitHub Repo	MIT	Utils for streaming large files (S3, HDFS, GCS, SFTP, Azure Blob Storage, gzip, bz2, zst...)
python-benedict				GitHub Repo	MIT	Dict subclass with keypath access and normalized input/output helpers.
tzdata				GitHub Repo	Apache-2.0	Provider of IANA time zone data
python-dotenv				GitHub Repo	BSD-3-Clause	Read key-value pairs from a .env file and set them as environment variables
dateparser				GitHub Repo	BSD	Date parsing library designed to parse dates from HTML pages
watchdog				GitHub Repo	Apache-2.0	Filesystem events monitoring
orjson				GitHub Repo	MPL-2.0 AND (Apache-2.0 OR MIT)	Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy
pytz				GitHub Repo	MIT	World timezone definitions, modern and historical
arrow				GitHub Repo	Apache-2.0	Better dates & times for Python
pytest-cov				GitHub Repo	MIT	Pytest plugin for measuring coverage.
alembic				GitHub Repo	MIT	A database migration tool for SQLAlchemy.
tbm13-utils				GitHub Repo	MIT	Utils made for personal use
psycopg2-binary				GitHub Repo	LGPL	psycopg2 - Python-PostgreSQL Database Adapter
pyhelpers				GitHub Repo	MIT	An open-source toolkit for facilitating Python users' data manipulation tasks
rich				GitHub Repo	MIT	Render rich text, tables, progress bars, syntax highlighting, markdown and more to the terminal
GPUtil				GitHub Repo	MIT	Python module for reading NVIDIA GPU status through nvidia-smi.
ortools				GitHub Repo	Apache-2.0	Google OR-Tools python libraries and modules
python-json-logger				GitHub Repo	BSD-2-Clause	JSON Log Formatter for the Python Logging Package
xlsxwriter				GitHub Repo	BSD	A Python module for creating Excel XLSX files.
validators				GitHub Repo	MIT	Python data validation utilities.
tabulate				GitHub Repo	MIT	Pretty-print tabular data
boltons				GitHub Repo	BSD	When they're not builtins, they're boltons.
asyncpg				GitHub Repo	Apache-2.0	An asyncio PostgreSQL driver
httpx				GitHub Repo	BSD	The next generation HTTP client.
funcy				GitHub Repo	BSD	Functional programming utility functions.
tqdm				GitHub Repo	MPL-2.0 AND MIT	Fast, Extensible Progress Meter
opencv-python				GitHub Repo	Apache-2.0	Wrapper package for OpenCV python bindings.
pdfplumber				GitHub Repo	MIT	Plumb a PDF for detailed information about each char, rectangle, and line.
send2trash				GitHub Repo	BSD-3-Clause	Send file to trash natively under Mac OS X, Windows and Linux
pydash				GitHub Repo	MIT	Functional utility library inspired by Lo-Dash.
python-slugify				GitHub Repo	MIT	A Python slugify application that also handles Unicode
toolz				GitHub Repo	BSD-3-Clause	List processing tools and functional utilities
colorlog				GitHub Repo	MIT	Add colours to the output of Python's logging module.
alive-progress				GitHub Repo	MIT	Progress bar library with throughput, ETA, and animation support.
PyYAML				GitHub Repo	MIT	YAML parser and emitter for Python
fasteners				GitHub Repo	Apache-2.0	A python package that provides useful locks
natsort				GitHub Repo	MIT	Simple yet flexible natural sorting in Python.
python-in-action				GitHub Repo	Not specified in reviewed metadata	Python crawler examples and utilities.
python-docx				GitHub Repo	MIT	Create, read, and update Microsoft Word .docx files.
dacite				GitHub Repo	MIT	Simple creation of data classes from dictionaries.
requests-toolbelt				GitHub Repo	Apache-2.0	A utility belt for advanced users of python-requests
python-pptx				GitHub Repo	MIT	Create, read, and update PowerPoint 2007+ (.pptx) files.
pyutil				GitHub Repo	GPL-2.0-or-later	Utility functions and classes for Python programmers.
common-pyutil				GitHub Repo	MIT	Some common python utility functions
pyutilator				GitHub Repo	MIT	Python Utility Decorators
pyutl				GitHub Repo	MIT	functions and utilities to recycle code
nb_utils				GitHub Repo	Apache-2.0	Python utility functions.
Python-Charmers				GitHub Repo	MIT	A collection of useful python programs.
appdirs				GitHub Repo	MIT	A small Python module for determining appropriate platform-specific dirs, e.g. a "user data dir".
backoff				GitHub Repo	MIT	Function decoration for backoff and retry
atomicwrites				GitHub Repo	MIT	Atomic file writes.
imutils				GitHub Repo	MIT	A series of convenience functions to make basic image processing functions such as translation, rotation, resizing, skeletonization, displaying Matplotlib images, sorting contours, detecting edges, and much more easier with OpenCV and both Python 2.7 and Python 3.
dry-pyutils				GitHub Repo	MIT	Python utility methods used across projects.
openpyxl				Source	MIT	Library for reading and writing Excel xlsx/xlsm files.
ruamel.yaml				Source	MIT	YAML parser and emitter with round-trip preservation support.
pripy-utils				GitHub Repo	MIT / Apache-2.0 / BSD-2-Clause metadata	Python utility collection.